Repentance · trinket

Hairpin

Fully charges active items when Isaac enters an uncleared Boss Room.

Trinket ID#120
UnlockAchievement #358

In-game pickup line

“Danger charge”

Mechanics

What Hairpin does

  • Entering a Boss Room that still has a live encounter restores the active-item charge.
  • Revisiting an already cleared boss room does not supply the same recharge.

Achievement #358

How to unlock it

Recharge an active item with Lil' Batteries 20 times.

Unlocking an item and finding it during a run are separate steps.

Explore more unlocks

In a run

Practical note

Spend your charge on the way to the boss, then enter with a fresh use ready.

Reference

Game data and sources

The trinket ID, icon, game-file tags, and short pickup line come from the extracted Repentance files. This effect explanation is an editorial summary checked against the references below. Repentance+ can differ.