I've had good luck with rocking the battery back and forth. Not enough pressure to damage the board. The pins will begin to give very quickly and will break off clean. I've done this on an A4000 and A3000. The method was recommended by a local tech. I've since had a new rechargable battery added to my 4000 by Amiga Center France so I know I didn't do any harm to the system.
Bob
