Hairpin

"Danger charge"

Trinket ID
5.350.120

Unlock Method
Recharge using Lil' Batteries 20 times

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

Effects

• 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

• 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

• 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.
  • : The item will gain both its charges.
• Mega Blast: Mega Blast gains only 3 charge units.

Gallery

• 

  Hairpin's original appearance prior to Booster Pack #4.

Trivia

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

Booster Packs
#1
#2
#3
#4
#5