[SOLVED] Calculate Li-Po battery capacity. nominal or full charge voltage?

[torini]

So I have a li-po battery which says 15Wh on it, I'd like to calculate the capacity in mAh, but which voltage do I use, nominal (3.7V) or full charge voltage (4.2v) ?

 

[sizzling]

Nominal voltage.

Remember the rated capacity is higher than what you can safely use.