I've got to believe the battery will come out with a little pressure. Those pull tabs are weak at best.
When you do get it out and reinsert it, try doing this for future removals. Get some masking tape and cut a strip about 4". Tape across the bottom, so that about 2" hangs past the end opposite from the battery terminals. Insert the battery. The tape should fold up over the end of the battery. Then, just push the tape down onto the top of the battery. Then, next time you need to remove it, you just pull the tape up and the battery should flip out. :exc:
I used to do this with radios when the tabs broke off. The kids tended to pull too hard.
Good luck. :approve: