Binding of Isaac: Rebirth Wiki
Binding of Isaac: Rebirth Wiki
Disambig.png This article is about the pickup. For the item, see The Battery. For other uses, see Battery (Disambiguation).

Batteries add charges to Isaac's active item when picked up.

Battery ID Image Charges Additional Info Unlock Method
Lil' Battery 5.90.1 Lil' Battery.png Removed in Repentance Full
Added in Repentance6
Removed in Repentance If Isaac has The Battery The Battery with no overcharge, only the main charge bar is filled. If the main bar is full, the overcharge is filled.
Added in Repentance Micro Battery 5.90.2 Micro Battery.png 2
Added in Repentance Mega Battery 5.90.3 Mega Battery.png 24 Overcharges Isaac's active item up to two full charges as if The Battery The Battery was held. If Isaac has multiple active items, it will charge all of them twice.
Added in Repentance Golden Battery 5.90.4 Golden Battery.png 6 Deals a full heart of damage when picked up. Another golden battery will spawn in a random room, but it is not shown on the map until discovered. Added in RepentanceGolden Battery Defeat Mega Satan as Tainted Forgotten Tainted Forgotten


  • Added in Afterbirth / Removed in Repentance Mega Blast Mega Blast only gains 3 charges per battery.
  • Added in Afterbirth † Batteries charge only the current active item, if holding multiple.
    • Added in Repentance If Isaac has an active item in the consumable slot, batteries prefer to charge the active item slot first.
  • Added in RepentanceHoly Mantle Holy Mantle and similar effects will block the damage from the Golden Battery, allowing for infinite usage of active items on that floor.
  • Added in RepentanceGolden Batteries can re-appear in undiscovered rooms, including both Secret Rooms.

Unlockable Achievements[]