Car Battery

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Car   Battery
Item icon
Item altar
"Active power up"
Table dividing line 1.png
Item ID
Character Appearance
Character appearance
Table dividing line 2.png
Item Pool
Added in Repentance Normal and hard modes only Battery Bum Battery Bum
Normal and hard modes only Shop Shop
Greed and greedier modes only Shop Shop
Table dividing line 3.png
Collection Grid
Removed in Repentance(page 3, column 11, row 6)
Added in Repentance(page 3, column 12, row 6)
Added in Afterbirth

Car Battery is a passive item added in The Binding of Isaac: Afterbirth.

Effect[edit | edit source]

Synergies[edit | edit source]

  • Added in Afterbirth †15►Broken Shovel Broken Shovel: Prevents the Mom's Foot from appearing for two rooms (empty or not), or for two waves of a Challenge Room or the Boss Rush.
    • Combined with items like 15►9 Volt 9 Volt or 15►The Battery The Battery, this synergy allows Isaac to (considering he entered the Boss Rush room with a full charge) essentially remove the feet for the entire duration of the Boss Rush.
  • Added in Afterbirth †15►Crooked Penny Crooked Penny: Splits the 50% chance to succeed into a 25% chance to quadruple all items and a 25% chance to duplicate all items while consuming the originals; the latter will make Devil deal and Shop items free.
    • Added in RepentanceThe 25% chance to duplicate all items while consuming the originals now generates 2 pennies instead.
  • Added in Afterbirth †15►Void Void: Doubles effects of all absorbed activated items. Absorbing passives will not give extra stat ups.
  • Added in Repentance15►Sulfur Sulfur: Counts as double activation for the current room.

Interactions[edit | edit source]

  • 15►Book of Secrets Book of Secrets: Activates twice, Removed in Repentance but has a chance to uselessly activate the same effect twice.
  • 15►Book of Shadows Book of Shadows/15►The Gamekid The Gamekid/15►My Little Unicorn My Little Unicorn/15►Unicorn Stump Unicorn Stump: Doubles the length of invincibility, but no effect on damage where applicable.
  • Added in Afterbirth †15►Clicker Clicker: If the Car Battery is removed by the first activation, a second activation will not happen. Two activations in a row is mostly detrimental, removing two items and possibly cycling through a character that lowers health.
  • 15►D4 D4/15►D100 D100: Instantly re-rolls Isaac's items twice, which doubles the speed at which the item pools are exhausted and transformations are achieved.
  • 15►The D6 The D6/15►D8 D8/15►D12 D12/15►D20 D20: Re-rolls twice instantly without any benefits. The D6 depletes item pools at double the speed.
  • 15►D7 D7: Doubles the amount of enemies summoned, but does not give double rewards.
  • 15►Dead Sea Scrolls Dead Sea Scrolls: Activates 2 random effects.
  • Added in Afterbirth †15►D Infinity D Infinity: Activates 2 random dice. The second activation die cannot be predicted.
  • Added in Afterbirth †15►Dull Razor Dull Razor: The invulnerability time is not increased, but damage-triggered items will activate twice if applicable.
  • Added in Repentance15►Eternal D6 Eternal D6: Re-rolls twice like The D6 (see above), but the 50% chance of the item disappearing is increased to 75%.
  • 15►Head of Krampus Head of Krampus: Doubles the damage the Brimstone beams deal to 44 (for a total of 880 damage per use). No effect on beam duration.
  • 15►The Hourglass The Hourglass: Doubles the length of the effect.
  • 15►Mine Crafter Mine Crafter: Spawns a Movable TNT and instantly detonates it, damaging Isaac.
    • Added in Afterbirth † This has been changed to spawn two Movable TNT barrels instead, which you can detonate at will.
  • Added in Afterbirth †15►Moving Box Moving Box: Activation swaps the contents of the box with the contents of the room.
  • 15►Spider Butt Spider Butt: Doubles in damage and slow time.
  • 15►The Bean The Bean/15►Mega Bean Mega Bean/15►Kidney Bean Kidney Bean: Deals double damage, but charms/poisons/petrifies for the same amount of time.
  • 15►Tear Detonator Tear Detonator: Multiplies detonated tears, resulting in 6x more tears than normal.
  • 15►Ventricle Razor Ventricle Razor: Places both trapdoors in same location.
    • Added in Afterbirth † Ventricle Razor works normally.

No Effect[edit | edit source]

Trivia[edit | edit source]

  • Removed in Repentance Prior to Repentance, Car Battery's description was "Double charge!"

In-game Footage[edit | edit source]

Unlockable Achievements[edit | edit source]

Seeds[edit | edit source]

PC A188 W1Q8 (First floor Shop)

Switch Q1ZZ ETS0 (Starting item as Eden)

Bugs[edit | edit source]

Bug Bug! Added in Afterbirth †15►Mr. ME! Mr. ME!: Grabbed items and pickups may become ghostly and impossible to pick up. Leaving the room and returning fixes this.

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