Test/review of BlitzWolf 36W Quickcharger BW-PL3

January 3, 2020, 7:40 am

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BlitzWolf 36W Quickcharger BW-PL3

Official specifications:

• Input voltage: 100-240V 50/60Hz
  
• Output: 2× 3.6-6.5V 3A, 6.5-9V 2A, 9-12V 1.5A
  
• Output power: 36 Watt
  
• Dimensions: 61 × 61 × 30mm
  
• Weight: 125g
  

I got it from Aliexpress dealer: BlitzWolf Official Store





Measurements

• Power consumption when idle is 0.13 Watt
  
• USB output is auto coding with Apple 2.4A, DCP and QC3
  
• Minimum QC3 voltage is 4.3V, will reset when lower voltage is selected
  
• There is a blue led above the USB connectors.
  
• Minus is common for the two USB outputs.
  
• Weight: 108.4g
  
• Size: 96.5 × 61.0 × 30.0mm
  

The overload protection kick in at 3.5A, this is fine for a 3A charger.

The other output is the same.

THe 9V output can deliver 2.5A, but the overload protection first kick in at 3.5A.

At 12V the charger can deliver 1.8A, but again the overload protection first kick in at 3.5A

The other output is the same.

For output test I runt one output at 5V 3A and the other at 12V 1.5A and the charger could maintain that for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

M1: 64.1°C, HS1: 71.1°C

M1: 63.2°C, M2: 57.5°C, HS1: 65.1°C

M1: 55.9°C, M2: 55.6°C, HS1: 58.5°C

M1: 58.1°C, HS1: 60.4°C

M1: 53.1°C, HS1: 69.5°C

At 0.5A the noise is 43mV rms and 1421mVpp.

At 1A the noise is 47mV rms and 1509mVpp.

At 2.5A the noise is 55mV rms and 1765mVpp.

At 0.9A the noise is 52mV rms and 1606mVpp.

At 1.2A the noise is 72mV rms and 1738mVpp.
Tear down

This can make it hard to get the circuit board out.

Mounting the base in my vice I could break the top off with my mallet and the circuit board was not that hard to get out.

At the input is a fuse, then a common mode coil, there is 4 smoothing capacitors with a inductors (L1 && L?) between them (Each switcher has a inductor and capacitor). Between the transformers are two safety capacitors, one for each USB output.
On the low volt side is some large mosfets (SFG10R10G) for synchronous rectification. Each output also has a QC controller (U2 & U4: Marked N06 / PJK953)

Why is there a heat transfer pad on top of the transformers, it do not touch the enclosure as can be seen on the white stuff that goes well above it.


On this side is the bridge rectifier and two advanced mains switchers (U1 & U3: INN2215k).


The distance between mains and low volt side is large enough.
Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.
Conclusion
A dual QC3 charger with a lot of power. It is is a nice design with two mostly independent QC supplies, but also some issues. The QC3 cannot go much below 5V and there is a lot of noise (probably common mode).
Notes
The USB charger was supplied by a reader for review.
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

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Test/review of CinkeyPro 5V 4 port 4A

January 11, 2020, 8:00 am

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CinkeyPro 5V 4 port 4A

Official specifications:

• Input voltage: 100-240 V 50-60Hz
  
• Output: 5.0V 4A
  

I got it from Aliexpress store: CinkeyPro Phone Accessories Shop Store

It is a cheap charger and as usual it is in a envelope without anything else.



Measurements

• Power consumption when idle is 0.16 Watt
  
• Top row of USB output is coded as DCP
  
• Android marked output is coded as Samsung 5V
  
• IOS output is coded as Apple 2.1A
  
• The outputs are in parallel.
  
• There is a led behind the green plastic.
  
• Weight: 50g
  
• Size: 76.4 × 52.4 × 32.0 mm
  

The charger can deliver about 3.3A on a port, not the rated 4A.

Another port is the same.

All ports together is also the same

And output current is also the same at 120VAC.

The charger can deliver 3A for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

M1: 60.5°C, HS1: 64.2°C
Both M1 and HS1 is the transformer.

M1: 44.5°C, HS1: 70.4°C
HS1 is the circuit board, heated by the transformer and maybe the rectifier IC.

M1: 66.2°C, HS1: 69.4°C

HS1: 59.1°C

M1: 50.3°C, HS1: 59.7°C

At 0.5A the noise is 18mV rms and 172mVpp.

At 1A the noise is 51mV rms and 322mVpp.

At 2.5A the noise is 33mV rms and 198mVpp.
Tear down

Using my vice to apply some pressure just below the green band broke the glue and I could open it.

At the input is a fusible resistor (F1) , the switcher IC (TD6520), beside the transformer is the safety capacitor. Around the USB connectors are 3 leds for lighting the green band.



On this side is the bridge rectifier (BD1) and a synchronous rectifier chip (U2: TC730). There is also 3 more leds for the green band.


The distance between mains and low volt side must be above 6mm, here it is more like 3mm.
There is another issue with safety, the wires connecting the circuit board to the plug can touch the low volt side, not very safe.
Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.
Conclusion
The rated 4A current is on the low side for four outputs, but the charger cannot even deliver the rated current and safety is not very good either.
Notes
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

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Test/review of UK Charger 5V 2A JHD-AP012B-05200AB

January 18, 2020, 7:43 am

≫ Next: Test/review of Qihang Fast Charger QH-Z03

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UK Charger 5V 2A JHD-AP012B-05200AB

Official specifications:

• Input voltage: 100-240V 50/60Hz
  
• Output: 5V 2000mA
  

I got it from Ebay



Measurements

• Power consumption when idle is 0.15 watt
  
• USB outputs is coded as USB charger (DCP)
  
• There is a green led in the top.
  
• Weight: 51.4g
  
• Size: 58.6 × 51.4 × 49.1mm
  

The charger can deliver about 2.9A before overload protection kicks in.

This drops to about 2.8A at 120VAC

The charger can deliver 2A for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

M1: 50.3°C, HS1: 56.0°C

M1: 63.9°C, HS1: 69.9°C
HS1 is the rectifier diode.

HS1: 61.1°C
Again HS1 is the rectifier diode.

M1: 52.3°C, HS1: 56.5°C

HS1: 74.8°C
HS1 is the transformer.

At 0.5A the noise is 5mV rms and 106mVpp.

At 1A the noise is 7mV rms and 145mVpp.

At 2.5A the noise is 7mV rms and 97mVpp, this is very low noise.
Tear down

It was a bit hard to break apart, but some screwdrivers uses as prybars worked.

A very compact design, it must be expensive to mount all the parts.
At the mains input is a fuse in shrink wrap and a MOV to handle mains transients. The bridge rectifier is four diodes (D1..D4). There is two smoothing capacitors (C1 & C2) with a inductor between. The mains switcher transistor (Q1) is next to the safety capacitor (CY1).
On the low volt side is a large rectifier diode (D7) and two smoothing capacitors (C5 & C?) with a inductor between.
There is a opto feedback.



The bottom of the circuit board do also have a lot of parts, mostly passive, but there is the switcher IC (U1) and on the low volt side the reference (U3: 431). There is space for a auto coding chip (U4), but it is not mounted.


Across a slot there must be 4 mm between mains a low volt side, there is a lot more space here. Directly across circuit board there must be above 6mm, but here it is slightly below 6mm!
Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.
Conclusion
The charger is a bit old fashioned in the design, but it works nicely with enough current and low noise. Safety is not perfect, but the problem is minimal.
Notes
The USB charger was supplied by a reader for review.
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

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Test/review of Qihang Fast Charger QH-Z03

January 25, 2020, 7:58 am

≫ Next: Test/review of Qihang QC3.0 Quick Charger Z05

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Qihang Fast Charger QH-Z03

Official specifications:

• Input voltage: 100-240V
  
• Output: 5V 3A, 9V 2A, 12V 1.5A
  

It arrived in a partial transparent plastic box.



Measurements

• Power consumption when idle is 0.05 Watt
  
• USB output is auto coding with Apple 2.4A, Samsung, DCP and QC3
  
• Minimum QC3 voltage is 3.6V
  
• Weight: 35.7g
  
• Size: 75.6 × 36.6 × 23.7mm
  

The charger is rated for 3A on 5V and deliver about 3.2A, this is fine.

It works the same on 120VAC.

At 9V it matches the 2A rating very nicely.

At 12V it is rather close to the 1.5A rating.

It looks better at 120VAC.

The overload protection must be temperature sensitive, it kicked in after 8 minutes at 2A load on 9V.

Reducing the current to 1.8A and it could handle a 1 hour test.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

HS1: 73.7°C
HS1 is transformer.

M1: 56.4°C, HS1: 62.2°C

M1: 47.4°C, M2: 39.4°C, HS1: 50.5°C

HS1: 57.4°C

HS1: 72.7°C

At 0.5A the noise is 48mV rms and 1835mVpp.

At 1A the noise is 42mV rms and 829mVpp.

At 2.5A the noise is 54mV rms and 1421mVpp.

At 0.9A the noise is 49mV rms and 1156mVpp.

At 1.2A the noise is 69mV rms and 1165mVpp.
Tear down

Putting a lot of pressure on the top of the charger with my vice made the lid pop out.

At the input is a fusible resistor in heatshrink, the two mains smoothing capacitors (C1 & C2) has a inductor (L1) between them. There is a safety capacitors (CY1) between mains and low volt side.




On this side is the bridge rectifier (BD1), the mains switcher (ATC9560), opto feedback, a rectifier diode (D3: probably DK5V85R1… synchronous rectifier), a QC controller (U3: Maybe LP103) and a reference (U4).


The distance between mains and low volt side is fine.
Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.
Conclusion
The charger is a fairly standard QC3 charger with good efficiency, the safety look fine. Like many cheap chargers it do not have any mains filtering, this means the radio emission it probably way above the legal limits.
Notes
The USB charger was supplied by a reader for review.
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

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Test/review of Qihang QC3.0 Quick Charger Z05

February 1, 2020, 12:22 am

≫ Next: Test/review of Samsung 1 port EP-TA20EWE (Maybe fake)

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Qihang QC3.0 Quick Charger Z05

Official specifications:

• Input voltage: 100-240V
  
• Output: 5V 3A, 9V 2A, 12V 1.5A
  
• Charger is marked: QH-Z06
  

It arrived in a partial transparent plastic box.



Measurements

• Power consumption when idle is 0.06 Watt
  
• USB output is auto coding with Apple 2.4A, Samsung, DCP
  
• Minimum QC3 voltage is 3.8V
  
• Weight: 46.3g
  
• Size: 80.4 × 39.1 × 27.1mm
  

The overload protection at 5V trips at 4A, this is well above the rated 3A

At 9V it is down to 2.6A

And at 12V it is about 1.9A

At 120VAC is can deliver slight more current.

The charger could deliver 9V at 2A for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

M1: 52.7°C, HS1: 71.2°C
HS1 is transformer.

HS1: 57.2°C

HS1: 65.4°C

M1: 74.4°C, HS1: 76.0°C

M1: 51.2°C, HS1: 71.7°C

At 0.5A the noise is 46mV rms and 1200mVpp.

At 1A the noise is 197mV rms and 1262mVpp.

At 2.5A the noise is 80mV rms and 1332mVpp.

At 0.9A the noise is 75mV rms and 1456mVpp.

At 1.2A the noise is 97mV rms and 1553mVpp.
Tear down

Mounting the base in my vice I could break the top off with my mallet.

At the input is a fusible resistor (FR1), it has the usually safety capacitor (CY1) between mains and low volt side and it has opto feedback (Placed below CY1).



On this side is the bridge rectifier (BD1), the mains switcher (ATC9560) and on the low volt side a large rectifier diode (D3: DK5V100R25C), the QC controller (U4: LP103S) and the voltage reference (U3).

The diode is not really a diode, but a synchronous rectifier


The distance between mains and low volt must be 4mm over a slot and above 6mm on the circuit board, this charger is below on both counts.
The charger passed the 2830 volt test, but failed the 4242 volt test between mains and low volt side, this makes it unsafe for 230VAC countries.
Conclusion
The charger is a fairly standard QC3 charger with enough output power and good efficiency, but there is a safety problem, the isolation between mains and low volt side is not good enough.
Notes
The USB charger was supplied by a reader for review.
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

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Test/review of Samsung 1 port EP-TA20EWE (Maybe fake)

February 8, 2020, 8:17 am

≫ Next: Test/review of Flowme 2 port with LED display HKL-USB36

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Samsung 1 port EP-TA20EWE (Maybe fake)

Official specifications:

• Input: 100-240V 50-60Hz 0.5A
  
• Output: 9.0V-1.67A 5.0V-2.0A
  
• MODEL: EP-TA20JWE
  

I got it from ebay dealer: swoy1753

It was on a plastic bag inside an envelop.



Measurements

• Power consumption when idle is 0.1 Watt
  
• USB output is coded with DCP and QC2 (5V & 9V)
  
• Weight: 35.4g
  
• Size: 76.0 × 37.7 × 27.8mm
  

It can deliver 3.5A at 5V, that is rather high for a 2A charger.

The output power is lower at 120VAC, but still well above the rated 2A

At 9V it can deliver about 2.2A.

And slightly lower with 120VAC input.

The charger could deliver 9V at 1.66A for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

M1: 73.0°C, HS1: 80.5°C

M1: 83.6°C, HS1: 86.4°C

M1: 70.3°C, M2: 52.4°C, HS1: 73.4°C

HS1: 80.0°C

M1: 44.4°C, HS1: 79.7°C

At 0.5A the noise is 18mV rms and 529mVpp.

At 1A the noise is 21mV rms and 467mVpp.

At 2.5A the noise is 25mV rms and 410mVpp.

At 0.9A the noise is 25mV rms and 635mVpp.
Tear down

Putting a lot of pressure on the top of the charger with my vice made the lid pop out.

On this side is the input fuse (F01), a MOV (TM01), a common mode coil, two mains smoothing capacitors (C01 & C02) with a inductor (L01/L02) between and a mains switching transistor (Q01).
There is the usual safety capacitor (CY01), partially isolated behind a plastic shield




Here is the bridge rectifier made with four diodes (D01..D04), the mains switcher controller (U01), opto feedback (OP01), the protocol controller (U02) and a reference (U3: 431). The rectification is a normal diode (D21).


The distance between mains and low volt side is about 5mm, this is on the low side.

Because one PCB track goes under the opto couple the distance is down to 4mm there.
Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.
Conclusion
These chargers are usually cheap imitations of the original Samsung, but I got a bit surprised when the QC only went to 9V (This is Samsung protocol) and the teardown shows a rather complex design with better isolation than many cheap chargers, but it is not good enough. The overload protection is at a too high level for a 2A charger.
I do not hope Samsung has ever sold this model, the isolation is not good enough.
Notes
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

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Test/review of Flowme 2 port with LED display HKL-USB36

February 15, 2020, 8:33 am

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Flowme 2 port with LED display HKL-USB36

Official specifications:

• Input: AC 100-240V
  
• Output: 5V 2.2A
  
• Net Weight: 55g
  

I got it from Aliexpress: FLOVEME Official Flagship Store

I got it in a cardboard box with some specifications on it.





The charger has a display that shows voltage and current, the led color indicates which on. Current will only be indicated when there is a current draw and the display turns off while charger is idle.
Measurements

• Power consumption when idle is 0.08 Watt.
  
• USB output is auto coding with Apple 2.4A, Samsung, DCP
  
• USB outputs are in parallel.
  
• Voltage display is within 0.01V.
  
• Display turns on at 0.2A and off when below 0.07A for 10 seconds.
  
• The current is combined for both outputs.
  
• Blue led indicate current, green led voltage display.
  
• Weight: 48g
  
• Size: 82.1 × 42.5 × 24.2 mm
  

The current display has good precision.

One output can deliver about 2.3A and the current measurement is before the voltage feedback, preventing voltage drop at high current.

The other output is the same 2.3A

And together it is also 2.3A

Running one hour with 2.2A was no problem.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

M1: 46.5°C, HS1: 59.4°C
HS1 is the transformer

HS1: 57.7°C

M1: 59.8°C, HS1: 67.2°C
M1 is the transformer and M1 is the rectifier chip.

M1: 48.1°C, HS1: 48.6°C

M1: 55.4°C, HS1: 58.3°C

At 0.5A the noise is 8mV rms and 143mVpp.

At 1A the noise is 10mV rms and 126mVpp.

At 2A the noise is 15mV rms and 163mVpp, all noise looks fairly low.
Tear down

Mounting the plug in my vice and hitting the body of the charger with my mallet broke it open.

At the mains input is a fuse or fusible resistor. There is two smoothing capacitors (C1 & C2) with a inductor (L1) between. There is a blue safety capacitor (CY1). The low volt side has a small circuit board for the volt and am meter.



The volt and am meter circuit board has a couple of resistors and capacitors, together with a single unmarked chip.

This side has mode capacitors and resistors, the display and the two leds.

On this side is the bridge rectifier (BD1), the mains switcher (U1: FT8393ND1) and a synchronous rectifier (U2: FT8370B 5V/2.4A). There is a current sense resistor (R15: 50mOhm) and two auto coding chips (U3 & U4: MA5889)


Distance between mains and low volt side must be 4mm when there is a air gap, here it is 1mm. A piece of plastic through the gab would have fixed this.
Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.
Conclusion
The charger works fine, but the output power is rather low for two outputs, it would have been acceptable for one output. Generally the charger looks good, but it has a safety problem, I wonder if the missing piece of plastic protection is a production fault on my copy.
Notes
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
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Have we worked with the outdate tech for charging ?

February 19, 2020, 10:27 pm

≫ Next: Test/review of BlitzWolf 30W QC3 4 port USB Charger BW-PL5

≪ Previous: Test/review of Flowme 2 port with LED display HKL-USB36

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Hi Bros,
A long time I have not come back this site and I’m a bit surprised that a lot of people still care about the charger with QC 2.0, QC 3.0 or even 24W, 36W charger…etc
Sooner or later, we should care about the new tech charger like SamSung, Oppo have worked: 15W, 25W, 45W (fast, faster, super fast charger).

Forget 5V 2A or 5V2.4A, we will go with the new tech like 12v+, 5v 4A or more to increase the SPEED of charging process.
BUT I did not see any test about the new charger like that, have we worked here with the outdate tech of charger ?

To people who has considered to purchase the new NORMAL charger (QC 2, 3 or event 5V 2.4A, 3A…), the current requirement is depend on your phone, even you use a 5V-2A+ charger to your phone, if your phone just accept 1A, the current charge also just got 1A from the charger no more.

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Test/review of BlitzWolf 30W QC3 4 port USB Charger BW-PL5

February 21, 2020, 7:19 am

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BlitzWolf 30W QC3 4 port USB Charger BW-PL5

Official specifications:

• USB Port: Four Ports USB
  
• Total Power: 30W (Max)
  
• Input: AC 100-240V 50/60HZ 0.8A MAX
  
• Output: QC3.0 Port DC 3.6-6.5V=3A/6.5-9V=2A/9-12V=1.5A
  
• Spower: Port DC 5V=2.4A Each port (Total 12W)
  
• Size: 61*61*30 mm
  
• Net Weight: 126g
  

I got it from Banggood


I got it in a small cardboard box with a label describing the contents.

It contained the charger and a instruction sheet.



Measurements

• Power consumption when idle is 0.11 Watt
  
• Regular USB outputs is coded as Apple 2.4A
  
• Regular USB outputs are in parallel.
  
• QC and regular USB are not connected.
  
• There is a blue led between the regular USB outputs.
  
• QC output is coded as Apple 2.4A, QC3 and Huawei-FCP
  
• QC3 can go down to 4.4V, below it will reset.
  
• Weight: 108g
  
• Size: 96.5 × 61.0 × 30.0 mm
  

Output 1 can deliver a bit above 2.6A. There is some cable compensation (i.e. the output voltage will increase with load).

Output 3 can also deliver a bit above 2.6A

Using all 3 regular output is the same 2.6A

Output current is slightly less at 120VAC.

The QC output can deliver about 3.7A on 5V

This is down to 3.2A at 9V

And about 2.5A at 12V, all well above the rated specifications.

The maximum output current drops slightly at 120VAC, but is still well above specifications.

Running one hour with 5V 2.4A and 12V 1.5A worked fine.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

M1: 52.9°C, M2: 56.5°C, HS1: 65.8°C
HS1 is the regular USB transformer.

M1: 54.1°C, HS1: 58.7°C

HS1: 57.5°C

M1: 66.1°C, M2: 64.1°C, HS1: 72.0°C

M1: 48.9°C, HS1: 70.9°C

At 0.5A the noise is 7mV rms and 127mVpp.

At 1A the noise is 9mV rms and 138mVpp.

At 2.5A the noise is 10mV rms and 147mVpp.

At 0.9A the noise is 26mV rms and 684mVpp.

At 1.2A the noise is 31mV rms and 825mVpp.
Tear down

I could not break this charger open, but had to cut a bit.

The electronic did not leave the charger easily either, there was a lot of the white stuff to keep it in.




At the mains input is a fuse, followed by a common mode coil. there is two sets of mains smoothing capacitors each wit a inductor between them. These is also two safety capacitors, one for each transformer.
Between the USB connectors are some leds.



There is a production fault at the mains input, one of the wires are not soldered!
On this side is the bridge rectifier (BD1), there is two switcher IC’s, for the regular USB output a small one (U3: OB2502) and for QC a larger all in one (U1: SC1271K). On the low volt side is a synchronous rectifier (U7: OB2005) for USB and the all in one chip only needs a MOS transistor for (U8: MOSFET HYG072N10 100V 80A) synchronous rectification. For the regular usb is two auto coding chip, a single (U2: Marked 1202) and a dual (U4: Marked 1212). The QC3 has its own control chip (U10: FT41).


There is good safety distance between low volt side and mains.
Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.
Conclusion
The charger works fine, but there is no reason for 3 regular USB outputs, the charger only has power for one! The QC output has more than enough power.
Except for the production fault (Missing solder) the charger looks good.
Notes
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

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Test/review of 5V 500mA USB charger US plug

February 29, 2020, 7:36 am

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5V 500mA USB charger US plug

Official specifications:

• Input: AC 100-220V 50-60Hz 0.1A
  
• Output: DC 5V 500mA
  
• Output Interface: USB Output
  

I got it from Ebay dealer: custom_car_cover

This is a cheap charger and it arrived in a plastic bag inside a envelope.



Measurements

• Power consumption when idle is 0.17 Watt
  
• USB output is coded as Apple 1A
  
• Weight: 20g
  
• Size: 66.0 × 37.6 × 14.5 mm
  

The 0.5A rating is a bit on the high side when the charger is run from 120VAC. It is more like 0.4A.
The voltage is on the high side.

At 230VAC it can deliver 0.7A, but the plug is for 120VAC.

I did the one hour test at 230VAC with 0.5A current and it could do that.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

HS1: 57.9°C
The hottest part in the charger is the transformer.

M1: 44.9°C, HS1: 47.4°C

M1: 41.1°C, HS1: 44.2°C

M1: 43.1°C, HS1: 49.3°C

M1: 35.5°C, HS1: 57.9°C
M1 is probably the rectifier that shows up, but it is not really warm.

At 0.5A the noise is 40mV rms and 392mVpp.
Tear down

After using my vice to crack the glue I could open it with a spudger.

In this side is a fusible resistor (R1) at the input, a transistor to handle the mains switching (Q1), a optocoupler with a zener diode at the low volt side. The rectification is a diode (D3).



This side has the bridge rectifier and the second transistor (Q2) in a two transistor mains switcher. The coding resistors (R7..R10) for USB output is placed below the USB connector.


The distance between mains and low volt side is about 4.5mm, this is considerable lower then the legal requirement.
Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.
Conclusion
I like the enclosure of the charger it looks nice, but that do not really help it. The output power is way to low and using a old type 1A coding for 0.5A charger is not very nice. The charger passes the high voltage test, but the creepage distance is too low, I also doubt the isolation in the transformer.
Notes
The USB charger was supplied by a reader for review.
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

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Any problem if use the charger with the current lower than the original one of smartphone ?

March 3, 2020, 2:21 am

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Hi bros,

I just bought a SamSung S9 and its original charger info is 5v/2A, 9/1.67A.

I had an Energizer charger model ACA1AUSCMC3 (5V/1A).

I want to use SamSung S9 charger for travel purpose only, will I face any problem with my phone if I use Energizer charger (5V/1A) to charge for my SS9 at home ? is there any prob with SS9 battery or with Energizer charger ?

Thank you in advance to have the clear explanation instead of just yes/no answer.

Test/review of 3A USB socket for 12V and 24V

March 7, 2020, 7:57 am

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3A USB socket for 12V and 24V

Official specifications:

• Input Voltage: 12-24V
  
• Output: 5V/3A
  
• USB Port: 1
  
• Voltage Meter: Digital display
  
• Measuring Range: 6-36V
  

I got it from ebay dealer: huangjian1992

A plastic bag inside a plastic envelope, fairly standard packing for cheap stuff from Ebay.

I got the charger and two spade terminals for connecting the wires.

The charger is made to be mounted in a hole.

On the back is spade terminals for power input, the front has a lid.

In addition to the USB output there is also a display showing the input voltage and the output current.
Measurements

• Power consumption when idle is 12mA from 12V
  
• Minimum QC3 voltage is 3.6V
  
• USB output is coded as: Apple 2.4A, DCP, QC3, Samsung-AFC, Huawei-FCP
  
• Weight: 26.0g
  
• Depth: 51.2mm with closed lid and including unconnected terminals on the bacl
  
• It will stick 9mm out from a panel and it can be mounted in a 19mm thick panel.
  
• Diameter: 28.4mm for mounting hole and 36.1mm for front.
  

The volt and ammeter are not very precise.

At 5V the charger can deliver about 3.7A.


Input voltage do not matter, current is nearly the same at any voltage.

With QC 9V it can maintain output voltage up to 2.7A, then it starts dropping.

At 12V it can “only” maintain output voltage up to 1.7A

Higher input voltage do not change it.


THe circuit has a cut-off at about 9.5V input voltage.


The cut-off voltage do not change when QC is activated.

The chargers current consumption depends on the input voltage and slightly on the display.

Running with 3A and 5V output for one hour worked fine.

I could also run with 9V output and 2.5A for a hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

M1: 54.0°C, HS1: 67.6°C
This photo and the one below is from the 5V 3A test.

M1: 57.7°C, HS1: 66.0°C

M1: 50.5°C, M2: 50.1°C, HS1: 60.7°C
Here is a photo from the 9V 2.5A test.

At 0.5A the noise is 32mV rms and 163mVpp.

At 1.0A the noise is 30mV rms and 134mVpp.

At 2.5A the noise is 40mV rms and 280mVpp.

At 0.9A and 9V the noise is 22mV rms and 120mVpp.

At 1.2A and 12V the noise is 4mV rms and 62mVpp.
Tear down

It was a bit difficult to break open.

There is one combined switcher and QC chip below the inductor. There is a diode in series with the input, i.e. it is protected against wrong polarity on the input terminals.

Typical schematic from the datasheet.

On the other side of the circuit board is the input and output capacitors.



Behind the display is the V&A meter chip, a voltage regulator and a sense resistor.
Being a 12V device there is no need to test with high voltages.
Conclusion
Even though it is a fairly cheap USB charger, I will call it a good one, the used chip supports a couple of codings, it has overload protection and acceptable noise.
Notes
Read more about how I test USB power supplies/charger
Compare car chargers and other DC supplied chargers

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Test/review of 4 port QC3 USB charger SLS-B07

March 15, 2020, 8:20 am

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4 port QC3 USB charger SLS-B07

Official specifications:

• Input: 100-240V 50/60Hz
  
• Output: 5V 3.1A
  
• Output QC: 5V 3A, 9V 2A, 12V 1.5A
  

I got it from a reader, I do not know where it was bought.

It arrived in a envelope.



Measurements

• Power consumption when idle is 0.2 Watt
  
• USB coding on the two center sockets auto with Apple 2.4A, Samsung, DCP
  
• USB coding on the last is USB charging (DCP).
  
• USB coding on QC output is Apple 2.4A, DCP, QC3, Samsung-AFC, Huawei-FCP
  
• Minimum QC3 voltage is 3.9V
  
• The 3 regular USB outputs are in parallel.
  
• There is some blue leds to light into the USB connectors.
  
• Weight 49.9g
  
• Size: 88 × 45.2 × 21.1mm
  

A single port can deliver about 2.8A

The same on another port.

And not very surprisingly the same when all ports are used together.

Using 120VAC do not change anything.

The QC output can deliver about 3.75A before output really start dropping, but it is on the low side at around 2.2A.

The 9V looks better, here it can deliver about 2.75A

And the 12V QC output can deliver about 2.1A

But only 1.5A with 120VAC supply.

Loading it with rated current, or a bit less on 5V it could only maintain output for 9 minutes.

Reducing both a bit did help, here I could run for about 23minutes.

With 2.2A on 5V and 1A on QC 12V I succeeded in running the one hour test.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

M1: 80.7°C, HS1: 84.3°C

HS1: 82.8°C

HS1: 89.4°C

HS1: 64.7°C

M1: 55.9°C, M2: 69.4°C

At 0.5A the noise is 105mV rms and 836mVpp.

At 1A the noise is 253mV rms and 1541mVpp.

At 2.5A the noise is 159mV rms and 761mVpp.

At 0.5A the noise is 58mV rms and 635mVpp.

At 2.5A the noise is 125mV rms and 1103mVpp.

At 9V 0.9A the noise is 104mV rms and 944mVpp.

At 12V 1.2A the noise is 137mV rms and 1165mVpp. There is a lot of noise on the outputs.
Tear down

Some pressure with my vice and a knock with my mallet and it was open.

On this side is one switcher chip (U1), one opto feedback, two transformers and two fake safety capacitor (? & CY2: 1nF 1kV).
There is two leds between the USB connectors.



On this side is the bridge rectifier (BD1) and the other switcher (U5: TD217), on the low volt side is a synchronous rectifier for 5V (U6: DP4110) and a dual charge optimiser (U7: HC2802). For QC there is also a synchronous rectifier (U8) and a QC controller (U4: HC6602) and a reference (U3: 431).


The connection for the fake safety capacitor runs along the edge of the circuit board up into the mains area, this means the creepage distance is less than a mm.
Testing with 2830 volt and 4242 volt between mains and low volt side failed for both. This makes the charger unsafe anywhere in the world.
Conclusion
With fake safety capacitor and very low distance between mains and low volt side there is only one thing to say:
STAYAWAY
Notes
The USB charger was supplied by a reader for review.
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

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Test/review of Kuulaa PD+QC 36W KL-CD06

March 28, 2020, 9:51 am

≫ Next: Test/review of Baseus Speed PPS Quick Charger USB+Type C 30W BS-EU905

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Kuulaa PD+QC 36W KL-CD06

Official specifications:

• Input: 100-240V 50/60Hz
  
• Output USB-C: 3.6V-6.5V 3A, 6.5V-9V 2A, 9V-12V 1.5A
  
• Output QC: 3.6V-6.5V 3A, 6.5V-9V 2A, 9V-12V 1.5A
  

I got it from Aliexpress: kuulaa Official Store

It arrived in a Kuulaa plastic bag inside a plastic envelope.



Measurements

• Power consumption when idle is 0.32 Watt
  
• USB-C PD outputs 5V 3A, 9V 2A, 12V 1.5A
  
• USB-C PD output is also coded with: QC3, Huawei-FCP, Samsung-AFC
  
• Minimum QC3 voltage is 4.2V
  
• QC3 output is coded as Apple 2.4A, DCP, QC3, Huawei-FCP
  
• GND is common for the two USB outputs
  
• Weight 66.1g
  
• Size: 74 × 48 × 28.3mm
  

It can easily deliver the rated 3A on the QC output.

And nearly the rated 2A for 9V

At 12V it can only deliver about 1.3A and not the rated 1.5A

Using a 230VAC supply it can easily live up to its rating.

The PD output can deliver 3.5A at 5V

At 9V it is slightly below the rated 2A.

At 12V it is again below the rating.

Using 230VAC it can easily live up to its rating.

I did the one hour run at 230VAC using 9V and 12V output, this only worked for about 10 minutes.

Reducing the current some improved the runtime to 20minutes

After reducing the current a bit more I could run it for one hour.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

M1: 70.6°C, M2: 59.3°C, HS1: 71.1°C
The two hot spots (HS1 & M1) are the two switcher chips.

M1: 64.2°C, HS1: 66.4°C

M1: 66.0°C, HS1: 67.0°C

M1: 54.0°C, HS1: 58.2°C
Here the hot area is partially due to the transformers.

M1: 55.1°C, HS1: 70.1°C

At 0.5A the noise is 97mV rms and 1121mVpp.

At 1A the noise is 47mV rms and 917mVpp.

At 2.5A the noise is 79mV rms and 917mVpp.

At 9V 0.9A the noise is 69mV rms and 1138mVpp.

At 12V 1.2A the noise is 68mV rms and 1121mVpp.

At 5V 0,5A the noise is 24mV rms and 953mVpp.

At 5V 2.5A the noise is 76mV rms and 970mVpp.

At 9V 0.9A the noise is 32mV rms and 1200mVpp.

At 12V 1.2A the noise is 37mV rms and 1306mVpp. There is a lot of peaks in the noise, probably common mode noise from bad mains filtering.
Tear down

I put some pressure on the enclosure with a vice and could then break the bottom away with my fingers.

The circuit is two nearly identical switch mode supplies, only difference is the output capacitor that is 1000uF for the QC and 470uF for PD. The only common part between the two are the input fuse (F1)
The QC controller (FT41NR) is placed next to the USB connector, the PD controller on a small circuit board.



On this side is the bridge rectifiers (DB1 & DB2), one for each switcher, the opto feedback (PH1 & PH2) and the references (IC4 & IC5: 431).


The PD controller has a PD chip (U1: FP6606C) and a MOS transistor to switch the output on/off.


The distance across the opto coupler is only 4.5mm, this is way below the requirements.
Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.
Conclusion
At 120VAC it cannot deliver rated power and it can never deliver rated power for longer time. The supply is also a bit limited with PD, where the maximum is 12V, not 20V.
The isolation distance between mains and low volt side is on the low side, especially for 230VAC.
Notes
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

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Test/review of Baseus Speed PPS Quick Charger USB+Type C 30W BS-EU905

April 18, 2020, 8:33 am

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Baseus Speed PPS Quick Charger USB+Type C 30W BS-EU905

Official specifications:

• Output power 30W
  
• Input voltage: 100-240V
  
• Output Type-C: 5V 3A, 9V 3A, 12V 2.5A, 15V 2A, 20V 1.5A
  
• Output USB-A: 4.5V 5A, 5V 4.5A, 9V 3A, 12V 2.5A
  
• Total output: 5V 5A max.
  
• Size: 58 × 52 × 28mm
  
• Weight: 92g
  

I got it from Aliexpress: BASEUS Official Store

I got the charger in a cardboard box with specifications on.

It contained the charger and a instruction sheet.



Measurements

• Power consumption when idle is 0.13 Watt
  
• USB QC and PD shares a converter, i.e. only one output works when using advanced coding (QC, PD, etc.)
  
• USB QC supports 20V output (This is very uncommon).
  
• PD output supports 5V 2A, 9V 3A, 12V 2.5A, 15V 2A, 20V 1.5A, PPS3-5V 3A, PPS:3-11V 3A
  
• PD output can also do DCP, Samsung, Apple 2.4A, QC3 Huawei-FCP, PE2 & Samsung-AFC
  
• Regular USB output can do Apple 2.4A, Samsung, DCP, QC3, Samsung AFC, Huawei-FCB& SCP
  
• Minimum QC3 voltage is 3.6V
  
• Weight 93.3g
  
• Size: 95.5 × 52.2 × 28.3mm
  

At 5V the output can deliver about 3.4A and there is some cable compensation.

At 9V the limit is the same.

And also at 12V.

The charger can do QC at 20V, there the current is limited to 2.1A

And slightly more at 120VAC.

The PD output has exactly the same current limit at 5V.

At 12V

And at 20V

And at 20V with 120VAC.

For the load test I used 20V 1.5A, but I could only test on one output.
The temperature photos below are taken between 30 minutes and 60 minutes into the one hour test.

M1: 53.0°C, HS1: 59.3°C

HS1: 50.2°C

M1: 53.9°C, HS1: 55.2°C

M1: 54.0°C, HS1: 55.9°C

M1: 45.6°C, HS1: 58.1°C

At 0.5A the noise is 10mV rms and 90mVpp.

At 1A the noise is 11mV rms and 88mVpp.

At 2.5A the noise is 27mV rms and 216mVpp.

At 9V 0.9A the noise is 13mV rms and 110mVpp.

At 12V 1.2A the noise is 18mV rms and 127mVpp.

At 20V 2A the noise is 20mV rms and 142mVpp, the noise is very low.
Because QC and PD uses the same converter I did not measure on PD, they will be similar.
Tear down

I could open this charger the usually way: Mounting the plug in my vice and banging on the enclosure with my mallet.

There is a fuse and a common mode coil at the mains input, then 3 smoothing capacitors with a inductor between. The main switcher transistor is mounted on a heatsink that has two layers, one goes on top of the transformer. There is a safety blue capacitor, but it is not easy to see.
The low volt side has a diode (DK5V100R25: Synchronous rectifier) and again 3 smoothing capacitors with a inductor between, this time a rather large inductor due to the high current. The two USB connectors is mounted on a small circuit board or rather two circuits boards.



The small circuit board contains a controller chip (SW3510). There are probably also two power mos transistors, I can see one of them below the USB-C connector (RU3040), the other is hidden on the back of the circuit board.

On this side of the circuit board is the bridge rectifier (BD1), the mains switcher (U1: Marked SPt c6). There is also a opto coupler (U2) and a reference (UA1: 431).


The distance between mains and low volt side is very good.
Testing with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.
Conclusion
This charger is for one device at a time and it do that very well with low noise, auto coding, lot of power (But not enough for laptops) and good safety. The two output are not really designed to be used simultaneous except with very simple devices.
Notes
Index of all tested USB power supplies/chargers
Read more about how I test USB power supplies/charger
How does a usb charger work?

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Test/review of USB tester Atorch UD18 (Hidance)

April 26, 2020, 8:03 am

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USB tester Atorch UD18 (Hidance)

Official specifications:

• Voltage: 3.600 – 32.00 V
  
• Current: 0.000 – 5.100
  
• Power calculation: 000.00 – 163.00 W
  
• Capacity accumulation: 0 – 99999 mAh
  
• Power accumulation: 0 – 999.9 Wh
  
• Temperature: 0 – 80 °C
  
• Timing time: 999H59M59 S
  
• USB D+ voltage: 0 – 2.99 V
  
• USB D- voltage: 0 – 2.99 V
  
• Over-C: Overcurrent protection>5A
  
• Over-V: Overvoltage protection>30V
  
• Low-V: Low voltage protection

I bought this from Aliexpress dealer: HIDANCE Official Store

The QR codes is a link to documentation and application on the mediafire.com server.

The box included the tester and a manual.
The tester supports an external temperature sensor, I bought one together with the tester.


The temperature sensor is a small NTC with a USB connector.

There is a couple of connections around the tester: USB-A, USB-C and DC 5.5/2.5mm barrel jack, all with both male and female




Display and functions
The meter has a two screen and a screen off function, they are selected with a click on the M button.

The main screen with lots of functions, holding down the OK button will rotate the screen in 90°C steps.
Holding down the M button will enable adjustment of the FCOP value, release and hold down again to move through: xW, xxM, TC, Over-C, Over-V, LOW-V, mAh, Wh and T. It is fairly slow to move between the different settings!

This display has higher resolution and can be rotated in 90°C steps.

The output can turn off due to a couple of conditions, one of them is over current.

The “FCOP” is Full Charger Off Power function, when it is on the output will be turned on when the power consumption is less than the “xW” value for xx minutes “xx M”.

With the thermosensor plugged in the display will show the temperature.

Holding the button down when powering on enters the configuration mode. Default standby brightness is 3, but I prefer full brightness all the time and turned it up to maximum.
Measurements
Measurements are done on USB A ports.

The meter needs some voltage before it will work or external voltage. The current input cannot zero correctly at low voltage.

The precision is fairly good, but there is no reason for this many digits.

• Own current consumption is 26mA at level 9 (Default 16mA at level 5).
  
• With display off own current consumption is 9mA
  
• Will measure current in both direction, but do not show actual direction (Reverse direction will include its own current consumption).
  
• Extern power do not override USB power, i.e. the 26mA will be drawn from a 5V or higher USB supply, even with external power connected.
  
• Internal resistance is about 0.11ohm including connection resistance with USB A connectors.
  
• Input voltage must be above 3.5V for the meter to work or external power must be connected.
  
• Current reading changed 0.2% after 30 minutes at 4.9A
  
• Voltage reading changed 0.2% after 30 minutes at 4.9A
  
• Remembers Wh and Ah when power is off
  
• Voltage display is within 0.01 volt in the 3.5 to 30.0 volt range.
  
• Current display is within 0.004 ampere in the 0 to 5.0 ampere range with 5 volt supply.
  
• USB C input do not turn on a PD supply, something connected to the USB C output must do that.
  

M1: 45.4°C, HS1: 59.2°C
This is the display side after 30 minutes with 4.9A.

M1: 53.6°C, M2: 49.0°C, HS1: 58.6°C
Android application
The QR code points to a directory with software and documentation for a couple of devices. As usual the mediafire server opens extra windows with ads when downloading from it.
I did not have any success with the Bluetooth connection, my phone (Android 9) would not connect to the UD18 device.

Screendump from the unconnected application, this application is for many different devices. It starts in Chinese mode.
Tear down

There was no screws in this tester, I could just pull it apart.

On this side is the display with some electronic beneath it.





The two 8 pin chips a transistors (4447A) connected to handle bidirectional power, the sense resistor is from DALE (12mOhm). There is a 3 pin voltage regulator chip (6203A) and the two chips with removed number is probably the ADC and the microprocessor. Bluetooth is a blue module.




There is nothing on this side.

Conclusion
This meter is rather universal with USB-A/B, micro, USB-C and 5.5/2.5mm barrel connectors and it has the typical functions for USB meters and with good precision (The 6 digit mode is silly, but 4 digit is fine). In addition to this it has a lot of options for turning off power, including a nice end-of-charge detection. With the temperature probe it is possible to see how hot a phone gets with normal contra quick chargers. The only real problem is the Bluetooth, that did not work with my phone.
Notes
How do I make the test

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Test/Review index of all tested usb chargers, any comments?

March 7, 2015, 9:57 am

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Review request for HKJ [USB Power Devices]

June 25, 2015, 11:46 am

≫ Next: [Review] Romoss Sense 4 - 10000 mah powerbank

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This thread is for review request for usb power devices. This means:

USB chargers

Power banks with both fixed or replaceable batteries.

USB meters

When posting a request, please post a link to where I can get it, i.e. a shop that ships to EU.

It will usual be a few month from I order the battery, until I can publish a review. I do often have many chargers in queue.

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[Review] Romoss Sense 4 - 10000 mah powerbank

December 23, 2020, 7:12 am

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There are bunch of 10000mah powerbanks, as they are most affordable and compact. And having experience of using and reviewing some of them , i`m sure Romoss Sense4 is definetely one of best in size\functionality\price ratio. Hope you`ll agree with me after reading this review.

Specifications:
Outputs: USB 1: DC5V 2.1A + USB 2: DC5V 1A
Inputs: Micro USB: DV5V 2.1A + Type- C: 5V / 2.1A
Size: 91 * 62.4 * 22.8mm 202g \ 0.9 * 3.6 * 2.4 inch, 7.23 oz
Capacity: 10000mAh (37Watt*h)

Romoss official store at:
Aliexpress
Amazon

Package and appearance

A neat little thin cardboard box. Modest yet neat design. Perfect for an inexpensive gift.

inside a standard set of power bank and charging cable. useless tiny leadership comes as a makeweight. The power bank itself is really very compact, promo pics don`t lie here. As expected, they dont mention that the decrease of length and width has led to the fact that this external battery turned out to be expectedly thicker than the classic 10000mah models.

In the end, we get a strong knocked down small rectangle made of white matte plastic with gray accents. There is nothing supernatural in the design, well, power banks are not at all the category of devices from which you expect some kind of elegance. Against the background of the mass of frankly outwardly poor models, Romoss Sence 4 looks quite winning.

The plastic does not stink, there are no creaks or gaps, it can withstand compression. Good build quality expected from Romoss.

The charge level indication is the simplest, four-segment.

Unfortunately, type-C is input only. I see no reason not to make it dualway, albeit with a current limitation of only 2A.

Here, in fact, everything. It would be worthwhile to disassemble it, but if this is a part of New Year gift for my nephew and the capacity test answers many questions about the giblets, then the review of the Romoss Sence 4 external battery will do without it.

Capacity test. Charge and discharge

At first glance, less than expected and this is bad. At a second glance, we look at the fact that 49 watt * hours got into it.

1 A discharge
In fact, a little less then stated. But read below

Important! For those who say “7048 Mah! Not enough!” let me remind you. 10,000mah in the specification is given for a voltage of 3.7v. The power bank is already giving 5v, and with this amendment it comes out just 7400mah. Therefore, it is most correct to look at the capacity indicated in the specification in watt * hours. There are 37 watts*hour. In the photo below, you see 35.7 watts * h. And this is really surprisingly close to the declared one, I did not expect such a coincidence – after all, the loss of conversion would also eat up some part of the nominal capacity

2A discharge.
There is already less capacity. It is worth clarifying that with an increase in the output power, one should expect a decrease in the given watt*hours. If the power bank supported some kind of PD / QC standard, the figure would be even more modest. This point, I am sure, is not at all obvious to the average buyer. As well as reducing the resource of the charged battery

OVERALLIMPRESSIONS

A good inexpensive power bank. I have no complaints at all. With a 1A discharge the efficiency turns out to be extremely high, insignificantly differing from the promised 37 watt*h. Other power banks that i had chance to test could not achieve such an efficiency in any way. But their price tag was the same as 10000mah models, in general, play in one extremely small price segment. BTW, i haven`t seen such a close specs\reality ratio in other powerbanks with larger capacity.

As a result, this review of the Romoss Sense 4 power bank for me personally put this model in one of 1st places in list of reliable inexpensive external batteries Sense 4 has lots of advantages: ffordable price, extremely compact size, remarkable efficiency at 1A discharge current.

10000Mah seems to be a not impressive capacity nowadays, but you can charge most smartphones 2 times or some really capacious models with a battery of about 6000mah 1 time.

Well, yes, it will not be fast charging, which is what it is. But I would not wait for it for $ 9-12 … Technically, if you have coupons and luck, you can grab a 20000mah close-to-noname model for the same price. But not everyone will be interested in carrying a power bank of this size and weight. And Romoss Sense 4 is actually a portable and compact power bank, which will fit everywhere (in a jeans pocket, I confess, it will be inconvenient because of its thickness) and will not burden you with weight. As well as not burdening the wallet.

—

Yeah, that`s me, ex-Narmattaru | Updated list of Aliexpress coupons and promocodes | How to choose flashlight, Main things in simple words

Charger can make the shorter life for the battery ?

January 5, 2021, 4:57 am

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USB Power Device Reviews

Hello,

I just lost my iphone11 charger and I have used Anker A2023 charger for 3 months, the phone battery was 100% health, but after 3 months with Anker charger, seem the battery situation is not good, checked and found the battery just only 83% health.
I just wonder the battery life also will be shorter if the quality of the charger is not good ? Can some one face the same issue ? the quality of charger can make the battery life shorter if it can provide more A than the phone needs ?
(I checked A2023 and still saw it can provide 5V/1A or 5V/2.4A stably for other devices.)

Thanks