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

The Battery is a passive item.

Effects[ | ]

  • Activated items can be overcharged, allowing them to store up to one extra use.
    • Extra charges appear in yellow over the normal charge meter.

Notes[ | ]

  • (in Rebirth and Afterbirth) The Battery does not affect self-recharging activated items.
  • (except in Repentance) Picking up a Lil' BatteryLil' Battery while the held activated item's main charge bar isn't full will only fill the main charge bar without adding overcharge.

Synergies[ | ]

  • 48 Hour Energy pill: A fully discharged item will be doubly charged, along with spawning 1 or 2 Lil' BatteryLil'Batteries.
  • (in Repentance)Collectible Friendly Ball iconFriendly Ball: Walking over a captured enemy will double charge the ball, allowing the enemy to be released, and allowing to catch a new one in the same room, and the process repeats. Trying to catch a new enemy while the old one hasn't spawned yet will have no effect.
  • (in Repentance) Collectible Jacob's Ladder iconJacob's Ladder / Collectible 120 Volt icon120 Volt: Increases the amount of arcs a spark can generate.
  • (in Repentance) Collectible Notched Axe iconNotched Axe: Causes remaining charge from the previous floor to carry over to the next one.

In-game footage[ | ]

Unlockable Achievements[ | ]

Trivia[ | ]

  • This item is used in It's in the Cards (challenge #14).
  • The screws that appear in Isaac's head may be a reference to Frankenstein's Monster.
  • The effect of this item was completely changed from the original Binding of Isaac.


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