"A standard battery. Looks like it can be used in a power supply box."
— Item description.
Battery (バッテリー Batterī ) is a key item in Resident Evil 0.
The battery is used to power the lift outside the training facility, on the first floor outside the front doors.
The item is located in a sealed compartment in the training school's Bar room. The player must play the piano as Billy to open the secret room.
- Resident Evil Zero Official Strategy Guide, Key Item List, Battery, Page 42.
- Hamamura (ed.), KAITAISHINSHO, p.289.