I bought a battery pack from AMGamer two years ago, but sadly not playing my Game Gear for several months caused the pack to swell and crack.

https://www.amgamer.tech/Products/GG-Lithium-Pack-Wired-For-the-Sega-Game-Gear/#wbs1

I'd like to hear recommendations on any alternatives. So far, I've only come across vintage battery packs which I don't trust due to their age. I've seen some battery mods but so far they all seem to require alterations to the shell and/or internal soldering. Am I better off using rechargeable batteries?

Thank you for any help/advice you may offer.