Binding of Isaac: Rebirth Wiki

9 Volt is a passive item.

Effects[ | ]

  • Fully charges the currently held active item upon 9 Volt's first pickup.
  • If the current active item has a recharge time of more than 1 bar, then it will grant 1 bar of charge whenever the item is activated.
  • If the current active item has a recharge time of 1 bar, then it will change the item to have a timed recharge of 15 seconds. The recharging of the item only triggers so long as there are enemies present in the room in any fashion. Empty rooms do not cause recharging to start.
  • (in Afterbirth † and Repentance) If the current activated item already has a timed recharge, 9 Volt makes it start at half charge when used, effectively halving the time to recharge and allowing quicker reuse.

Notes[ | ]

Synergies[ | ]

  • 2-bar items: Fills the entire gauge in a single room, effectively granting the opportunity for the item to be used every room.
  • (in Afterbirth † and Repentance) 3-bar items: Quadruple rooms and L-shaped rooms give 2 bars after clearing them, allowing one free use of the item in those rooms if the gauge is full upon entering them. It can also be used at the beginning of a Boss Challenge Room to get the full charges back after beating both bosses.
    • (in Afterbirth † and Repentance)AAA BatteryAAA Battery + 3-bar items: Same as the 2-bar item synergy without AAA Battery.
  • (in Afterbirth † and Repentance) 4-bar items: In a Challenge Room, if the item is used during the first wave, it will get all its charges back at the end.
    • (in Afterbirth † and Repentance)AAA BatteryAAA Battery + 4-bar items: Same as the 3-bar item synergy without AAA Battery.
  • (in Afterbirth † and Repentance)Collectible Jacob's Ladder iconJacob's Ladder: Increases arcing distance of sparks.
  • (except in Rebirth) Character Keeper iconKeeper: The Collectible Wooden Nickel iconWooden Nickel and the 9 Volt allow him to gain health (and money) forever, as long as there is an enemy in the room.
    • An enemy spawned in a cleared room will also cause recharging to start.
  • (in Repentance)Collectible Telekinesis iconTelekinesis: The item can be reactivated the moment the previous charge stops, making it always active.

Interactions[ | ]

  • Collectible 9 Volt icon9 Volt: No further decrease in charges.
  • (in Repentance)Collectible Alabaster Box iconAlabaster Box: No effect.
  • (in Afterbirth † and Repentance)Dim BulbDim Bulb: Prevents Dim Bulb from working, as minimum charge becomes 1 instead of 0.
  • (in Repentance)Collectible Eraser iconEraser: No effect.
  • (in Repentance)Collectible Everything Jar iconEverything Jar / (in Repentance)Collectible Larynx iconLarynx: The first bar gains an automatic recharge, but the further bars will not be affected.
  • Collectible Sharp Plug iconSharp Plug:
    • (except in Repentance) Renders the Sharp Plug unusable on 2+ charge items. Sharp Plug can only be used if the item is at 0 charges, but 9 Volt instantly gives +1 charge to the item upon activation.
    • (in Repentance) Lowers the cost of using Sharp Plug by half a heart on 2+ charge items.

In-game Footage[ | ]

Unlockable Achievements[ | ]

Trivia[ | ]