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Old 03-25-2013, 05:42 PM #1
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Question Testing Li-on batteries chargers

I have a pile of these cheap Li-Ion chargers. A few of them the charge status LED does not light, stays green, or exhibits other strange behavior.
Is there a way to test these with DMM to see if they DOA defective or just have a bad display LED.
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Old 03-25-2013, 11:13 PM #2
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Default Re: Testing Li-on batteries chargers

Chances of the LED itself being bad are just about a pile of zero.

You can test for open-circuit voltage and charge current I suppose.
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Old 03-28-2013, 06:50 PM #3
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Default Re: Testing Li-on batteries chargers

Best way would be to log the voltage and current over the entire charge cycle of a cell, and make sure it stays within limits for the cell that the charger was designed for.

battery university has a decent article about the proper charging method:
Charging Lithium-Ion Batteries ? Battery University
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Old 03-28-2013, 07:07 PM #4
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Default Re: Testing Li-on batteries chargers

Yeah... That is what I was looking for, some idea of the nominal values so I can check the quality chargers I am getting.
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