4.5 Volt
ItemRepentanceUnlocked
passiveGame ID 647★★★★
How do you unlock 4.5 Volt?
Verified starting unlockSource data confirms that no unlock is required.
Active items don't charge when clearing rooms. Instead, they're charged by dealing damage to enemies.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking 4.5 Volt leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13