Re: Battery doctor
it doesn't help.
charge your phone at your convenience.
in theory, every so often charging your phone from single digit %'s to 100, and leaving it plugged in for a couple hours after that.... in theory that is supposed to 'help'... thats what they say. but how can you tell? get two phones and do a longitudinal comparison study over say 6 years? no!
so charge at will. and if you are so compelled, every once in a while drop it low and then charge all night so it stays plugged in for a number of hours. to me it's like avoiding walking under a ladder. whatever floats your boat.
i found battery doctor annoying cause i was always preoccupied with being careful to not charge (with the app) until it hit 20% or lower; and then further been preoccupied with not unplugging it until the trickle charge phase was complete. it was a hassle to be concerned with such things... can you imagine?
so i deleted the app a couple of years ago and it was liberating! (:0
hope that helps.