|A Sub Battery is a mission item required to power the Submarine. It currently has no other functions or uses.|
Common Places Edit
The Sub Battery can be found in a lot of different places, from Crew Deck's Rooms to Cargo Hold. But the easier way to find it is in the Power-Locked Rooms.
If you don't have any fuses to open the Power-Locked Rooms, try searching in Deck 3.