/diy/ - Do It Yourself

>>1621342
Do you know how CC/CV works? Read up on it. As long as you know they’re supposed to be 4.2V fully charged, just run 500mA- 1A CC to be safe up to 4.2V, then it switches to CV at 4.2V and the current will start dropping. So total time depends on the cell and all those variables, but to make it easy, just start the timer when you hit 4.2 and it switches from CC to CV, and time it for an hour or two after that or watch for the current to drop off real low.

Try to find the data sheets of known cells and read up on C ratings because that will tell you everything about the optimal current to charge at.