[HKJ]

Uniross Charger LCD 3-5H





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



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



The pack contained the charger and an instruction sheet.



The charger plugs directly into a mains outlet



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.



Specifications are listed on the back.



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









Measurements charger

• Power consumption when idle is 0.63 watt
• Charge will restart charging after power loss, or battery insertion.
• Will discharge NiMH batteries with less than 0.1mA when unpowered.

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



A little bit faster termination this time.



Oops, about two hours to termination.



Again a nice curve.




Also a nice curve.



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.



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



A full cell is discovered and charging stopped.



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



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



M1: 30.3°C, HS1: 48.0°C



The charger needs a about 1.4 seconds to initialize.



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