Car Battery
ItemAfterbirthUnlocked
passiveGame ID 356★★★★
How do you unlock Car Battery?
Verified starting unlockSource data confirms that no unlock is required.
Causes Isaac's activated item to activate twice on each use.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Car Battery leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13