Not sure this is in the same area but I noticed today when my battery was drained to zero it will not recharge. I dont get any indication on the display that it is charging. AC charger or USB charger do the same thing. Unless there is something wrong with the BB, the battery may be so low it will not recharge. I never had this happen before so I hope it's just the battery. These batterys are not supposed to have a memory but maybe they do when they go so low.