Batteries

This article is about the pickup. For the item, see The Battery. For other uses, see Battery (Disambiguation).

Pickups

Hearts

Coins

Bombs

Keys

Batteries

Pills

Cards/Runes

Chests

Sacks

Lil' Battery

Lil' Battery will fully charge Isaac's activated item upon pickup.

Lil' Battery will recharge 6 bars of Isaac's activated item, but does not overcharge it.

Lil' Battery will only charge the currently held active item. Holding two actives (e.g. with Schoolbag) will not charge both items upon pickup.

Micro Battery

A Micro Battery provides two bars of charge for Isaac's held active item when picked up.

Mega Battery

A Mega Battery will charge Isaac's activated item twice. It will double charge items with over 6 bars.

Golden Battery

A Golden Battery completely recharges Isaac's held item, but also deals a full heart of damage. Another golden battery will spawn in a random room, but it is not shown on the map until discovered.

Unlocked by: Defeat Mega Satan as Tainted Forgotten

Notes

• Mega Blast only gains 3 charges per battery.
• If Isaac has The Battery and the recharge time for his held item is less than 6, Lil' Battery will overcharge the item for the remaining charges left in the Lil' Battery.
• Holy Mantle and similar effects will block the damage from the Golden Battery, allowing for infinite usage of active items on that floor.
• Golden Batteries can re-appear in undiscovered rooms, including both Secret Rooms.

Unlockable Achievements

• 

  Hairpin - Recharge using Lil' Batteries 20 times.

Gallery

• 

  Rebirth concepts, including Batteries.