Just acquired an 8820 which has worked fine for a few weeks but after charging the battery overnight, the device starts runs for a few seconds then dies and restarts.

Anyone seen this before?

Have you tried a battery-pull yet? 1st step to take if device is having problems? - BlackBerryFAQ

Post back if that doesn't help. Also, it would be very helpful if you could tell us what changes or installations you've made prior to this happening...

The battery has been pulled on more than one occasion.