Droid 2 Global, charging battery problem

[mikegibbous]

So I flashed the phone back to froyo
tried to update it to a gb rom without updating the kernel
the battery ran out so I keep the charger in

when the charger is in the light will come on and charge and then try to start itself up and will stay on the Motorolla logo forever, and it'll drain its own battery because it can't charge.
sometimes I'll get lucky and get into CWM and try to restore it to a previous but it runs out of battery doing that too...
and I can't just keep the charger in, it'll boot up on it's own.

How the hell do I charge this thing??