My phone will be fully charged and then I'll talk on the phone for like 5 minutes and then the phone will turn off and say the battery is dead. If I let it sit for 5 minutes turned off, then turn it back on, it will be fully charged again. I probably need a new battery but it just started happening the other day, it's not like it was a gradual thing. PS. I think I'm done with LG because every one I've had decides to turn off at random times.