The Battery

The Battery is a passive item.

Effects

 * Active items can store an extra level of charge, allowing them to be used twice in one room.
 * Extra charges appear in yellow over the normal charge meter.

Synergies

 * 48 Hour Energy pill: A fully discharged item will be doubly charged, along with spawning 1 or 2 Lil' Batteries.
 * : Causes remaining charge from the previous floor to carry over to the next one.

Trivia

 * This item is used in It's in the Cards (challenge #14).
 * The screws that appear in Isaac's head may be a reference to Frankenstein's Monster.
 * The effect of this item was completely changed from the original Binding of Isaac.