I have the motorola droid. My Dad was telling me he always keeps his blackberry connected to a charger, unless he is out and about. He tells me Lithium Ion batteries have no memory, and it is better for them to stay mostly charged, to avoid getting too low on juice. Charging from a low power state generates a great deal of heat, and is not good for the battery. Is this concept true for the Droid? Is the best thing for it, to keep it connected to a charger?