The battery doesn't like extreams of both high power, and low power. Let the power get too low and you could kill the little lions (cute name) for good, at very least you will permanently lose some of the capacity of your battery conversely, when charging, don't go all the way to 100% full, unplug it at 80 - 90% doing this will give you less usage time during the following day, but you will extend the overall life of the battery. Once every 500 or so charges you should go to 100%.