I have a 7.4v LiIon that hold 1450ma. I have a variable DC bench power supply that I can crank up or down and adjust as needed. I want to quickly charge the battery and noticed if I adjust the power supply to 7.4V +- I can only get 150 ma or so current out of the power supply. If push the Volts to7.8 I can get 300 am and the current keeps going up the more I increase the voltage. How far can I push the battery to charge it quickly? Could I use 9vdc to charge a 7.4vdc battery. Note: there is no circuitry unless inside the battery itself. I just attached probes from the supply to the battery. Wish there was an easy way to make a cradle for the different pins on batteries- but that a different topic altogether.

enter image description here


Sounds like an engineering SE question? The spec sheet for that battery might have charging information.

Rule of thumb: SAFELY trickle-charge at 1/10th of the amp-hours rating, so for example a 300mA-H battery is charged at 30mA for ten hours or more. For RAPID charging, an algorithm or time-profile is used, and those designed for one manufacturer's products may destroy any slightly different batteries.

Yes, the supply-voltage during recharge is always higher than the battery quiescent voltage.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.