A 2s lipo has a nominal voltage of 7.4v

When fully charged straight off the charger it will be 8.4v

Set your LVC at 3.5v / cell when your pack comes out of your car it should be around 7.4v

A resting voltage of 7.4v means the pack has roughly 20% left in it

When charging you should be adding around 80% of a packs listed capacity back in

5000mah sized pack - 4000mah added when charging

Allthough discharge is not linear here is a handy table to remember


Resting voltage vs Capacity

8.4v - 100%
8.26v - 90%
8.12v - 80%
7.98v - 70%
7.84v - 60%
7.70v - 50%
7.56v - 40%
7.42v - 30%
7.28v - 20%
7.14v - 10%
7.00v - 0%


Cheers