- Not to be confused with the passive item, The Battery.
9 Volt is a passive item.
Isaac gets a battery embedded into his skull.
Leaves Isaac with two bars already charged after using his activated item. Also fully recharges Isaac's current activated item upon pick-up.
- Reduces cooldown time for The Candle to 1.2 seconds.
- When used with The Battery, allows for rapid use of held items.
- Synergizes well with Yum Heart, Book of Revelations, Prayer Card, and other items that have a long recharge time.