Binding of Isaac: Rebirth Wiki

AAA Battery is a trinket.


  • If an activated item would regain its second to last charge upon clearing a room, it is instead fully charged. This effectively reduces its charge time by one bar.


  • Does not affect items with only one bar of charge or those with automatic recharge.
  • Recharging an item by taking damage with Habit Habit, the instant charge given by 9 Volt 9 Volt, or any source of charge other than clearing a room, will not activate the trinket's effect.


  • Added in Afterbirth †Schoolbag Schoolbag: The trinket activates based on the primary item slot, but it grants an extra point of charge to the second item as well.
  • 9 Volt 9 Volt: If active item requires three or more charges, trinket gives an extra charge, effectively utilizing itself with 9 Volt.


  • The Battery The Battery: No effect on the second level charge.
  • Added in AfterbirthWatch Battery Watch 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.

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