Charger Leise NiMH 2 slots LS-U2C

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

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

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

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The charger is usb powered with a micro usb input.

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There is a led for each slot that will light up for the 9 hour a charge takes.

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The specifications are on the bottom of the charger.

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

supportedBatteryTypes
supportedBatterySizes

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Measurements

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The battery is nearly charged fully in about 9 hour with a fairly low charge current.

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This cell is charged fully, again in 9 hour.

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The pro is far from fully charged, the charger again used 9 hour.

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Not much surprise, 9 hour charging and the charger stops.

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The AAA also gets 9 hour at a lower current and is overcharged a bit.

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

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With two batteries each battery gets the same current and the same 9 hour.

Temp5412

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

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

Poweron

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