Gru must reach the room's exit on the right side of the screen. Unfortunately it is blocked by a red platform. The platform can be flipped down if it receives power but the battery is in a pit at the bottom of the room.

Gru commands 5 minions to form a stack on the battery. He shoots them with his web gun so that they stick to the battery.

Gru steps on the green button. This powers a large piston, which lifts the battery and minion stack into the air.

Gru steps off the green button. The piston sinks back down but the sticky minion stack is now attached to the ceiling, causing the battery to hang in the air.

Gru orders a minion stack to stand next to the pit in the floor. He pushes them down to form a minion bridge over the pit.

Gru recalls the sticky minion stack. They leave the room, causing the battery to fall onto the minion bridge. The battery is ready to be pushed into the socket. There's a piston controlled by a blue button that could be used to push it, but it's obstructed by a blocker attached to a magnet.

Gru orders a lone minion to stand beneath the magnet.

Gru shoots the lone minion with the magnet gun, causing the minion to become magnetized. The magnet is attracted to the minion. It is connected to a blocker via a pulley system. The lowering of the magnet causes the blocker to lift into the air.

Gru stands on the blue button. With the blocker out of the way, the piston can fully extend. It pushes the battery forward.

The piston pushes the battery into the socket. It powers the red platform, which flips down.

Gru can now exit the room.