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What is the best way to charge a Li-ion battery?

08/13/2021

Charge at 1C (2500mAh battery charge at 2500mA). Will take like an hour in this phase from completely discharged to around 3/4

Charge at that current until voltage reaches set maximum. Then keep the voltage constant for one more hour for full charge (optionnel).

Set maximum like that (not LiFePo cells, most regular Li-ion batteries):

4.0V – very long lifeyears and thousands of cycles.

4.1V long life – ans

4.2V normalfew years, 200–500 cycles.

4.3V short lifeup to a year, few hundred cycles.

4.4V very short lifeyou need maximum capacity immediately after charge, will replace battery after 50–100 cycles.

Charge up to 4.0V for everyday use (one cycle or more per day).

Charge up to 4.1Vuse on the same week

Charge up to 4.2V for immediate use (same day).

Do not charge for storage. Keep voltage up to 3–3,5V for long term storage.

Don’t discharge below 2.5V

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