>>35285904What i do is wrap the battery on to the metal receivers(?) A few layers so that when you put the cartridge back together the extra layers of electrical tape help to press the battery in place while the tape helps to stick it there. Kind of works on two fronts.
If you arent comfortable with thay anotger thing my friend would often do is set the battery in place with epoxy glue you would use for pc parts and then double that up with a layer of electrical tape.