Hairpin
TrinketAfterbirth+Locked
How do you unlock Hairpin?
In The Binding of Isaac, Hairpin is unlocked by unlocking Hairpin (Achievement).
Structured pathSource-backed requirements are mapped into trackable steps.
Fully recharges Isaac's active item upon entering a boss fight.
How to unlock: Recharge using Lil' Batteries 20 times
What unlocking Hairpin leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13