Power Wheels 12-Volt Rechargeable Replacement Battery This 12-volt battery has been designed to fulfill rigorous Power Wheels requirements in order to provide the best possible performance Use with: Fisher-Price Power Wheels Advanced Series vehicles Type 12V battery system only With internal, self-resetting fuse; also comes with an instruction booklet containing important safety information Use only with approved Power Wheels vehicles of the appropriate type specified Overcharging or under-charging the battery may shorten battery life and decrease vehicle running time. The battery must be upright while charging.