Had the same problem with one of my batteries. I have 5 so I switched to a new battery and no problem. I was traveling for the holidays and waited till I got back and put the bad battery in my battery charger and now no problem. I think when the batteries get to a certain level the Pre won't recognize it. Since I have so many batteries didn't try to take it and put on Touchstone overnight to see if that would repair. Good luck and if you don't have an extra battery, go to the local Sprint office, ask for the Manager and tell him/her you have a battery problem. When I did that they tossed me 2 batteries in a heartbeat. I have nothing but good thoughts about Sprint, fortunately in a good connection area and after 10 years I am very happy with service, especially pricing.