Charger Hexinyu HXY-H1

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A single cell universal charger with voltage display and two currents that is powered from usb.

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

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The pack contained the charger, a usb cable and a instruction sheet.

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The micro usb power input connector.

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The user interface is a display and a single button, the button is used to select chemistry and charge current.
Pressing the button wil show charge current, pressing again will change current. Holding the button down for 10 seconds will change chemistry.

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On the first picture I have captured the power up display that shows all segments, the next is the voltage display.

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During charging it will change between voltage, current and time.

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The charger uses the classical slider construction, it will handle from 35mm to 70.5mm long batteries.

supportedBatteryTypes

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The slider is too loose for 16340 batteries.



Measurements on charger


Charging LiIon

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The charger uses some sort of simulate CC/CV voltage curve, but with way to high termination current. This can be seen on the voltage drop when the charger terminates, on newer batteries it is not that bad.

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The battery is charged nearly full.

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This is an older cell and the simulated CC/CV means voltage goes above 4.2V and when it terminates there is a fairly large voltage drop.

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The charger terminates early on this cell, maybe duee to a timer.

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This old and worn out cell do not like this charge algorithm.

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It works better with this cell, but the high termination current is a problem.

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Adding a 0.5ohm resistor to simulate a long cable or weak charger did not work perfectly, the charger stops too early (Probably a timeout).

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It uses up to about 1A from usb when charging.

Temp4287

M1: 32,2C, M2: 43,1C, M3: 34,4C, HS1: 43,2C
The battery do not heat much in this charger.

Temp4288

HS1: 43,6C

PoweronLiIon

The charger needs about 2.5second to start.

CurrentChangeLiIon

It pauses every 10 seconds to measure the voltage, it is acceptable for displaying voltage, but is not really a good way to control charging. The current can be changed at any time.



Charging LiFePO4

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With LiFePO4 it stops without tapering the current.



Charging NiMH

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The charger stops on voltage and there is no trickle charger, this means the batteries will be slightly below full charge.

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The two high capacity cells looks fine

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The eneloopXX has way to high internal resistance to be charged on this charger (The cell is basically worn down).

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No problem terminating at 0.5A

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The AAA is also handled fine.

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With voltage termination it is fairly fast to stop on a full cell, here it takes 5 minutes.

Temp4291

M1: 38,8C, M2: 48,2C, M3: 39,6C, HS1: 60,8C
With NiMH everything gets a bit warmer.

Temp4291

HS1: 46,9C

PoweronNiMH

Again the charger needs 2.5 second to start, here the measuring pulses occur more often.

CurrentChangeNiMH

Voltage measurements are done more frequently when charging NiMH.



Conclusion

The LiIon charging is not with the recommended voltage and the batteries will get some over voltage, for older batteries the final charge will also be slightly low.

NiMH is charging to just about full but I am missing the top-off charge, this would have stuffed slightly more energy into the batteries.

I will rate the charger as acceptable.



Notes

The charger was supplied by Banggood for review.

Here is an explanation on how I did the above charge curves: How do I test a charger