Uniross Charger LCD 3-5H

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This is a fairly simple NiMH charger for AA and AAA cells.

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I got the charger in a blister pack. The pack has a few specifications on it.

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The pack contained the charger and an instruction sheet.

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The charger plugs directly into a mains outlet

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The user interface is a LCD display with 4 batteries on it and a 3. different messages: CHARGE, READY, BAD.
Very simple and easy to understand.

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Specifications are listed on the back.

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The charger uses the typical two level slots for NiMH AA/AAA batteries.

supportedBatteryTypes

supportedBatterySizes

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Measurements charger

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Nice charging, the termination is slightly slow, but works.

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A little bit faster termination this time.

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Oops, about two hours to termination.

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Again a nice curve.


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Also a nice curve.

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This cell is very worn and the charger cannot really terminate on it. The time used is exactly the same as #3 above, it looks like a maximum charge time/capacity. The limit is fairly good for AA cells, it prevents serious over charge.

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With AAA a lower charge current is used and again the termination was rather slow.

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A full cell is discovered and charging stopped.

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Charge speed is the same with 4 cells in the charger.

Temp5165

M1: 29.0C, M2: 31.6C, M3: 33.4C, M4: 31.1C, HS1: 38.1C
The charger is fairly low current and do not get very warm.

Temp5166

M1: 30.3C, HS1: 48.0C

Poweron

The charger needs a about 1.4 seconds to initialize.

Charging

It has both short and long measuring pulses, I wonder why.


Testing the transformer with 2830 volt and 4242 volt between mains and low volt side, did not show any safety problems.



Conclusion

This is a simple and not that fast charger and sometimes it misses termination, but due to its capacity/time limit it will always stop without doing any serious damage to the batteries.

I will rate it acceptable.



Notes

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