Poppy Playtime Chapter 4 throws players into their first puzzle as soon as they start the game. Once Poppy departs from the elevator and leaves us to explore the facility, the "Investigate the Control Room" objective pops up on the screen. The first step to exploring this facility is to get out of this area, which can only be done by unlocking the door. However, it's missing a battery, and we'll need to find it to proceed to the next area.