Battery Bum is a machine in The Binding of Isaac, added in the Repentance DLC.

Costs 1¢ to play.

Possible payouts
• 1-3 charges to Isaac's active item, able to go over the normal charge amount, up to a maximum of 2 full charges.
• Micro Battery
• Lil' Battery
• Watch Battery
• AAA Battery

If holding multiple active items, priority will be given to charging them regularly before overcharging.

Final payout
• Random item from the Battery Bum item pool.

When destroyed
• Drops several random pickups, a pill, or a trinket.
• +35% chance for an Angel/Devil Deal.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this machine for the previous Repentance version, check this page instead.

• Check out the machine description on the external Isaac Wiki.