The Binding of Isaac: Rebirth
637 Achievements
800-800h
Steam
Extension Cord
Unlocked a new item.
34.5%
How to unlock the Extension Cord achievement in The Binding of Isaac: Rebirth - Definitive Guide
Unlocked by having The Battery, 9 Volt, and Car Battery in your collection. This mean you've picked each up at any point and doesn't have to be in the same run.