A couple weeks ago i got the dreaded "Please Wait Very Low Battery" message..i let it sit on the usb charger for a day to see if that would help, it didn't. i then purchased a new battery on amazon thinking the battery finally gave way after 4 yrs of use. i install the new battery, ipod turns on then an hr later, i get the same "Please Wait Very Low Battery" message. is something draining the battery? or could it be another issue?