Watch Battery is a trinket added in The Binding of Isaac: Afterbirth.
Effects[ | ]
- Increases the chance of a
Lil' Battery pickup after clearing a room by 6.67%. - Increases the chance of random pickups being a Lil' Battery by 2%.
- Has a 5% chance to add an extra charge to Isaac's activated item upon completing a room.
Synergies[ | ]
- Jacob's Ladder: Increases arcing distance of sparks.
Interactions[ | ]
- 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[ | ]
- Jumper Cables - Pick up any 2 of the following items/trinkets in a single run: 9 Volt, The Battery, Car Battery, AAA Battery, and Watch Battery ( Any 2 items that have the 'battery' item tag).
Any 2 items that have the  Batteries
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| Items |
| Trinkets |
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 The Binding of Isaac: Rebirth
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