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Trinket icon
"Danger charge"
Table dividing line 1.png
Trinket ID
Table dividing line 3.png
Unlock Method
Hairpin Recharge using Lil' Batteries 20 times
Added in Afterbirth †

Hairpin is an unlockable trinket added in The Binding of Isaac: Afterbirth †.

Effects[edit | edit source]

  • Fully recharges Isaac's active item upon entering a boss fight.
    • This effect only occurs the first time a Boss Room is entered; leaving and re-entering the Boss Room will not result in more recharges.

Notes[edit | edit source]

  • If a floor has the Curse of the Labyrinth, the item will fully charge twice; once for each Boss Room.
  • In Greed mode, grants a full charge only for the two boss fights on the final level.
  • The effect is identical to picking up a battery, with caveats listed in interactions.

Interactions[edit | edit source]

  • 15►The Battery The Battery: If the item doesn't have a full first charge level, it will be filled. If the first level is full, the second charge level will be filled.
    • Added in Repentance: The item will gain both its charges.
  • 15►Mega Blast Mega Blast: Mega Blast gains only 3 charge units.

In-game Footage[edit | edit source]

Gallery[edit | edit source]

Trivia[edit | edit source]

  • Hairpin has been added in Booster Pack #1, after the initial release of the DLC.
  • Hairpin is based on this Steam Workshop trinket by
  • Hairpin's original description was "Poke that power outlet! Bosses charge you".

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