i tried a joye 510 battery, i tried boiling for 20 minutes, didn't do anything - cut the atty connector off dremeling around the sides, but found it was probably just press fit on, not glued, so believe i would try securing it screwed into an battery connector stuck down into a tight hole in a piece of wood then gently rocking it back and forth to break the grip and then pull it out...but cutting some of the shoulder of the battery connector didn't prevent me from using it, just scarred it up.
good profits has 510 connectors for $0.99 (i think that's the place, i got 8)
