Originally Posted by KjellM
Lithium batteries like frequent partial recharges. Recharging fully when only 10 to 15% discharged will actually extended the overall lifetime of the battery. The deeper you discharge the battery before recharging it the shorter the lifetime of the battery. If you fully discharge the battery before recharging the battery will die after 300 to 400 recharges - and run time on a full charge will get shorter and shorter ! Frequent recharging extends the lifetime of the battery and reduces the rate at which the battery looses capacity.
Thanks KjellM, that's exactly the reply I was hoping for!