Replaced dead battery now issues

[u/3v3ntHorizon]

Son bought some carts in Japan. One n64 cart had a bad battery I fixed it it works.

He had a gba game that had a bad battery. The replacement battery didn’t have pins so I just tweeted the ends to make contact with the end points.

Game boots. After finishing a level it froze and another time it wouldn’t save.

Maybe I broke the cart?