The Battery
ItemRebirthUnlocked
passiveGame ID 63★★★★
How do you unlock The Battery?
Verified starting unlockSource data confirms that no unlock is required.
Activated items can be overcharged, allowing them to store up to one extra use.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking The Battery leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13