Testing Li-on batteries chargers

• Mar 25, 2013

• #1

TeufelWolf

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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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• Mar 25, 2013

• #2

Cyparagon

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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.

 

Last edited: Mar 25, 2013

• Mar 28, 2013

• #3

BShanahan14rulz

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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

 

• Mar 28, 2013

• #4

TeufelWolf

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