i just want to make a few things clear 1.I didnt charge my ipod for 4 hours the first time so will this permanently shorten my battery life even if i charge it for 4 hours afterwards? 2.I have had the ipod for 2 months now and sometimes I dont charge it fully, will this shorten my overall battery life too? 3.Sometimes I leave my ipod to charge overnight, is this ok? or do i need to unplug it after 4 hours? 4.does jailbreak app sbsettings drain battery even if it is little?