Having been stuck in a similar (non-culinary) situation re failed batteries in the past,
I now check carefully to see that any batteries are standard, replaceable and easily available types instead of custom jobs designed to tie you to that manufacturer. Sony is the worst offender that I know of. Nothing is theirs is standard.
Of course, that cuts me out of buying some things I'd quite like but that's better than ending up with an expensive toy I can't use.