Calc method of battery percent

[myoshida1199]

The way how to get battery percentage now is based on this concept :

Maximum battery voltage is 4.2V and Minimum battery voltage is 3.0V ( 3.3V for lipo battery).

But actually TP4056 module tells us with BLUE LED that it is finished charging battery . But they determine that by
watching the current (not a voltage ) .

So always the voltage of the battery end up with 4.05～4.08V indeed . It never reach to 4.2V technically .

I think this firmware should calculate the max voltage as 4.08V or something like that .

Then it will be 100% right after BLUE LED .

[mp-se]

Thanks for the input, but according to the battery specification 4.2V is fully charged and the voltage measurement is still not that accurate so the percentage is just an indication but that should be an indication on the charge of the battery not what the charger can provide. When i measure most of my builds the battery will be at around 4.2V. The one thing that could be adjusted is the minimum level since i belive the battery is 0% around 2.75V and not 3V as I use today, but below 3V the device would no longer function.