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Audioguru

Sep 24, 2016
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A charging current of 1A (1000mA) is much too high for a little 150mAh battery. It should be no higher than 150mA so change the resistor (use 8.2k for 150mA) on the charging circuit. The charging circuit senses that the battery voltage is high enough (due to extra voltage caused by the high current in the battery resistance) then shuts off too soon.
 

Paul Barber

Jan 4, 2017
34
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Jan 4, 2017
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34
Thanks, so if I changed the battery to 3.7v 1000mah would this work better?

Thanks again
 

Audioguru

Sep 24, 2016
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Yes, a 1000mAh battery can be charged at 1A. Get a high quality battery, not a factory reject or fake one sold on ebay.
 
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