will_work4tears: Lithium batteries (used in all modern phones and tablets) work best when not drained completely before recharging. In fact, there's usually fi

will_work4tears: Lithium batteries (used in all modern phones and tablets) work best when not drained completely before recharging. In fact, there's usually firmware specifically designed to cut power off before the battery completely discharges, because completely discharging the battery can physically damage it. (Completely discharging LiPoly batteries can actually produce a fire hazard, because gaseous hydrogen is generated inside the cell!)