Charger Leise NiMH 2 slots LS-U2C





This is a fairly simple dual NiMH charger powered from USB.







It arrived in a cardboard box with brand name and not not much else on it.



The box contained the charger, a usb cable and a instruction sheet in Chinese.



The charger is usb powered with a micro usb input.



There is a led for each slot that will light up for the 9½ hour a charge takes.



The specifications are on the bottom of the charger.




The charger uses the classic two level construction for AA/AAA batteries.










Measurements

• Power consumption from usb when idle with no batteries is 0.4mA
• The charge current will depend on battery voltage, see voltage sweep curve below.

The battery is nearly charged fully in about 9½ hour with a fairly low charge current.



This cell is charged fully, again in 9½ hour.



The pro is far from fully charged, the charger again used 9½ hour.



Not much surprise, 9½ hour charging and the charger stops.



The AAA also gets 9½ hour at a lower current and is overcharged a bit.



The full eneloop gets 9½ hour, that is about 9 hours of overcharge.



With two batteries each battery gets the same current and the same 9½ hour.



M1: 40.5°C, M2: 40.5°C, HS1: 97.0°C
The charger use a linear regulation and need to burn some power, this means there is a rather hot location on it.



Being a very simple charger I could draw the current profile. There is no regulation.



The charger do not have any controller that need time to initialize, but starts immediately




Conclusion

The charger is a very small size, due to this is can be useful, but is is very slow and use a timer based termination. The low charge current means that damage to a battery is fairly limited and the charger can be used sometimes, but it is a bad idea to use this charger as the main charger for NiMH.

I will rate it usable.



Notes

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