Binding of Isaac: Rebirth Wiki

Added in Afterbirth

Watch Battery is a trinket added in The Binding of Isaac: Afterbirth.


  • Increases the chance of a Lil' Battery Lil' Battery pickup after clearing a room by 6.67%.
  • Increases the chance of random pickups being a Lil' Battery Lil' Battery by 2%.
  • Has a 5% chance to add an extra charge to Isaac's activated item upon completing a room.


  • AAA Battery AAA Battery: Watch Battery triggering after clearing a room will also trigger AAA Battery, provided the activated item was missing exactly 3 charges prior to clearing the room.

In-game footage[]

Unlockable achievements[]