Car Battery

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Item icon
Item altar

 
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Character appearance
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Item Pool Shop.png Shop
Greed mode onlyItem Pool Shop.png Shop
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(page 3, column 11, line 6)
Added in Afterbirth

Car Battery is a passive item added in Afterbirth.

Effect[edit | edit source]

Synergies[edit | edit source]

  • Blank Card Blank Card
    Blank Card Icon.png4 roomsHas the same effect as the card or rune currently held by Isaac.
    / Placebo Placebo
    Placebo Icon.png4 roomsWhen used, copies the effect of the pill Isaac is currently holding without consuming it. Does not copy the effects of cards or runes.
    : Activates the card or pill twice.
    • Blank Card + Algiz Algiz
      Algiz Icon.pngGrants a shield which lasts for 30 seconds.
      : Doubles the shield duration to 60 seconds.
  • Book of Revelations Book of Revelations
    Book of Revelations Icon.png6 roomsAdds 1 soul heart, increases the chance for a Devil or Angel Room to appear, and increases the chance for the next boss to be a Horseman (except on XL floors and floors with fixed bosses such as Mom).
    / Satanic Bible Satanic Bible
    Satanic Bible Icon.png6 roomsUpon activation, Isaac gains a black heart.
    : Isaac gains 2 soul/black hearts.
  • Book of Shadows Book of Shadows
    Book of Shadows Icon.png3 roomsUpon use, creates a protective shield nullifying all types of damage for 10 seconds.
    : Active shield lasts for 20 seconds as opposed to 10 seconds.
  • Box of Friends Box of Friends
    Box of Friends Icon.png4 roomsUpon use, duplicates all of Isaac's familiars for the current room.
    : Adds two of each unique familiar.
  • Added in Afterbirth † Crooked Penny Crooked Penny
    Crooked Penny Icon.png4 roomsSpawns a penny and has a 50% chance to double all items and pickups in the room. If the effect fails, the items and pickups disappear.
    : 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.
  • Deck of Cards Deck of Cards
    Deck of Cards Icon.png6 roomsGives Isaac a random Tarot Card.
    / Mom's Bottle of Pills Mom's Bottle of Pills
    Mom's Bottle of Pills Icon.png6 roomsGives Isaac a random pill, and will cause him to drop any held Q-slot item (If any). The player will only receive six different pill types in one playthrough.
    : Spawns two pills or cards. The second pill or card is dropped on the floor unless Isaac has Deep Pockets Deep Pockets
    Deep Pockets Icon.pngAllows Isaac to carry two cards or pills (or a combination of both) at the same time.
    , Little Baggy Little Baggy
    Little Baggy Icon.pngIsaac can hold 2 pills at once and all cards are replaced by pills.
    , Added in Afterbirth † Polydactyly Polydactyly
    Polydactyly Icon.pngAllows Isaac to carry two cards, pills, or any combination of both at the same time. Drops a random card or pill.
    or Starter Deck Starter Deck
    Starter Deck Icon.pngIsaac can hold 2 cards at once and all pills are replaced by cards.
    with both slots empty.
  • The Gamekid The Gamekid
    The Gamekid Icon.png6 roomsUpon use, turns the character into a into a Pac-Man-like creature for 5 seconds, granting invulnerability, inflicting fear on all enemies, and replenishing half a red heart container for every two enemies killed.
    : Increases the duration of the Gamekid effect.
  • Glass Cannon Glass Cannon
    Glass Cannon Icon.png4 secondsWhen used, reduces Isaac's health to half a heart (including soul and black hearts) and fires one large piercing spectral tear that does a lot of damage. The damage done by Glass Cannon scales with Isaac's damage (at base damage it does 45 damage).
    : Fires two tears.
  • Guppy's Head Guppy's Head
    Guppy's Head Icon.png1 roomsSpawns 2-4 blue flies to damage enemies.
    : Doubles the amount of flies spawned.
  • Head of Krampus Head of Krampus
    Head of Krampus Icon.png6 roomsFires a cross-patterned brimstone shot, just like The Fallen and Krampus shoot.
    : Fires two sets of Brimstone beams, each of which has a chance to rotate.
  • Monster Manual Monster Manual
    Monster Manual Icon.png3 roomsSummons a random familiar for the current room. Can summon familiars not yet unlocked.
    : Spawns two random familiars. May spawn the same familiar twice.
  • The Nail The Nail
    The Nail Icon.png6 roomsAdds one soul heart and allows the breaking of rocks and damaging enemies by simply walking over them. Increases damage and decreases speed. All effects except for the Soul Heart wear off upon leaving the room.
    : Grants two soul hearts and double the usual buff to damage, with only the normal debuff to speed.
  • The Pinking Shears The Pinking Shears
    The Pinking Shears Icon.png6 roomsSeparates Isaac's head and body for the current room. Isaac's head, which now has flight, will be under the player's control, while his body will seek out enemies to attack by contact damage.
    : Spawns 2 headless bodies.
  • Prayer Card Prayer Card
    Prayer Card Icon.png6 roomsGrants an eternal heart per use.
    : Gives an instant heart container.
  • Tammy's Head Tammy's Head
    Tammy's Head Icon.png1 roomsShoots 10 tears in a circle around Isaac, which retain the damage, shot speed, and special effects (such as poison) of Isaac's tears.
    : Doubles amount of tears fired.
  • Unicorn Stump Unicorn Stump
    Unicorn Stump Icon.png1 roomsUpon use, grants invulnerability and increased speed for five seconds, but removes the ability to shoot tears.
    : Increases the duration of invulnerability.
  • Added in Afterbirth † Void Void
    Void Icon.png6 roomsConsumes all pedestal items in the room. Active items will have their effects added to Void, and passive items will grant stat upgrades.
    : Doubles effects of all absorbed activated items.
  • Yum Heart Yum Heart
    Yum Heart Icon.png4 roomsRestores 1 whole red heart.
    : Replenishes two red hearts instead of one.
  • Wooden Nickel Wooden Nickel
    Wooden Nickel Icon.png1 roomsWhen used, has a 50% chance to drop one random type of coin (penny, nickel, or dime).
    : Increases chance of spawning a coin, and adds possibility of dropping two.

Interactions[edit | edit source]

  • Added in Afterbirth ? Card ? Card
    Q Card Icon.pngWhen used, copies the effect of Isaac's currently held activated collectible item.
    : Only activates the item once.
  • The Book of Belial The Book of Belial
    The Book of Belial Icon.png3 roomsUpon use increases damage by 2 for the current room and by a further +50% if the character also has the Blood of the Martyr.
    Removed in Afterbirth Guarantees a Devil Room or Angel Room will be open after beating a boss while holding it, or Added in Afterbirth increases the chance by 12.5%.
    : No effect.
  • Book of Secrets Book of Secrets
    Book of Secrets Icon.png6 roomsUpon use, gives the effect of Treasure Map, The Compass, or Blue Map for the duration of the current floor.
    : Activates twice, but has a chance to uselessly activate the same effect twice.
  • Book of Shadows Book of Shadows
    Book of Shadows Icon.png3 roomsUpon use, creates a protective shield nullifying all types of damage for 10 seconds.
    : Doubles the the length of the invinciblity shield to 20 seconds.
  • The D6 The D6
    The D6 Icon.png6 roomsAllows Isaac to re-roll collectible items in the current room into other items, depending on the current room's Item Pool.
    /D8 D8
    D8 Icon.png4 roomsRe-rolls Isaac's speed, range, tears, and damage.
    /D12 D12
    D12 Icon.png3 roomsRe-rolls all rocks in the current room into other random objects, such as bomb rocks, metal blocks, TNT, or poops.
    /D20 D20
    D20 Icon.png6 roomsRerolls all pickups in the current room.
    : Re-rolls twice instantly without any benefits. D6 depletes item pools at double the speed.
  • D4 D4
    D4 Icon.png6 roomsRerolls all of Isaac's items.
    /D100 D100
    D100 Icon.png6 roomsUpon use, rerolls all passive items on Isaac like the D4, every pedestal item in the room like The D6, and every pickup like the D20.
    : Instantly re-rolls Isaac's items twice, which doubles the speed at which the item pools are exhausted and transformations are achieved.
  • Dead Sea Scrolls Dead Sea Scrolls
    Dead Sea Scrolls Icon.png2 roomsTriggers the effect of a random activated item from a list of possible options (not every activated item is included).
    : Activates 2 random effects.
  • Diplopia Diplopia
    Diplopia Icon.pngOne time useDuplicates all pickups and item pedestals in the room.
    : A second car battery has no effect. Using Diplopia with the Car Battery already acquired will not quadruple the contents of the room.
  • Glowing Hour Glass Glowing Hour Glass
    Glowing Hour Glass Icon.png2 roomsWhen used, this item will rewind time, put Isaac back in the previous room, and undo anything that happened in the current room. Any health, pickups, or items gained or lost will be reset back to the previous state.
    : No effect.
  • Guppy's Paw Guppy's Paw
    Guppy's Paw Icon.pngUnlimitedRemoves one red heart container in exchange for gaining 3 Soul Hearts.
    : No effect.
  • IV Bag IV Bag
    IV Bag Icon.pngUnlimitedUpon activation, Isaac loses a half-heart (one whole heart in The Womb onwards) for a random amount of coins, similar to the blood donation machine.
    : No effect.
  • The Jar The Jar
    The Jar Icon.pngUnlimitedWhen at full health, up to 4 extra hearts can be stored in the jar.
    : No effect.
  • Jar of Flies Jar of Flies
    Jar of Flies Icon.pngUnlimitedEvery time Isaac kills an enemy, a fly will be added to the jar, up to a maximum of 20. Using the Jar of Flies will release all the flies that are currently in the jar as friendly blue flies that will damage enemies.
    : No effect.
  • Kamikaze! Kamikaze!
    Kamikaze! Icon.pngUnlimitedCreates an explosion in the same area as Isaac, dealing half a heart of damage to him and also damaging all enemies caught in the blast radius.
    : No effect.
  • Mine Crafter Mine Crafter
    Mine Crafter Icon.png1 roomsWhen used, places an explosive TNT barrel that can be pushed and used to destroy rocks or damage enemies. If used a second time in the same room while the previous TNT barrel is still intact, it will remotely explode the TNT.
    : Spawns a barrel and instantly detonates it, damaging Isaac.
  • Added in Afterbirth † Moving Box Moving Box
    Moving Box Icon.png4 roomsIf the box is empty, picks up all items and pickups in a room and stores them. If the box is not empty, places all stored items and pickups in the current room.
    : Activation swaps the contents of the box with the contents of the room.
  • Added in Afterbirth † Mr. ME! Mr. ME!
    Mr. ME! Icon.png4 roomsSummons a controllable ghost that can perform various tasks depending on what it targets.
    : Grabbed items and pickups may become ghostly and impossible to pick up. Leaving the room and returning fixes this.
  • Pandora's Box Pandora's Box
    Pandora's Box Icon.pngOne time useUpon use, spawns certain pickups or items depending on the floor it is used on. Single-use.
    : No effect.
  • Added in Afterbirth † Potato Peeler Potato Peeler
    Potato Peeler Icon.pngUnlimitedRemoves a heart container, increases damage and range, and grants a Cube of Meat.
    : No effect.
  • Razor Blade Razor Blade
    Razor Blade Icon.pngUnlimitedUpon use, deals one heart of damage to Isaac and grants +1.2 damage for the current room.
    : No effect on hearts depleted, nor on damage gained.
  • Red Candle Red Candle
    Red Candle Icon.png4 secondsThrows a persistent flame that deals high damage and diminishes as it damages enemies or blocks shots.
    : No effect.
  • Ventricle Razor Ventricle Razor
    Ventricle Razor Icon.pngUnlimitedCan be used to place an orange portal and a blue portal. Upon entering a portal, Isaac is teleported to the other portal.
    : Places both trapdoors in same location.

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)


The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth
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