Set up auto-transfers and stopped thinking about it.

Try using a cotton swab dipped in white vinegar to clean the corrosion off the board contacts. Sam_shah isn't wrong about hardware store confusion, but why not ask at an electronics recycling center instead? They're usually more equipped for battery disposal. Can a board be saved after a leak? It depends on how long the acid has been eating away at the traces. What's the worst cart you've ever lost to battery damage?