Charging lipos after storage?

[JaySki]

Lipo is charged to 4.2V as a general "Rest" voltage but is actually rated at 3.7V under load and should maintain that voltgae or very close to it until the batteries energy mAh starts to drop. This is why LVC's are used.. Once the batteries energy(or large bulk of it) is used up, the voltage will start to drop pretty quickly.
SO.. Storage charge isn't based on the voltage, as it is always the same... but based on how much energy is put back into the battery... thus 60% of the batteries capacity.