USB Battery Charger for AA NiMH and NiCd

Posted on Feb 5, 2014

The charger in this project is designed to charge two AA NiMH or NiCd cells of any capacity (as long as they are the same) at about 470mA. It will charge 700mAh NiCds in about 1. 5 hours, 1500mAh NiMHs in about 3. 5 hours, and 2500mAh NiMHs in about 5. 5 hours. The charger incorporates an automatic charge cut-off circuit based on cell temperature, an

USB Battery Charger for AA NiMH and NiCd
Click here to download the full size of the above Circuit.

d the cells can be left in the charger indefinitely after cut-off.

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