The battery cover locks the battery in place. Once removed, the battery becomes free to fall out of the power station.

Remove the metal battery cover.

During reassembly:

Hook the short edge of the cover without cutouts into place at the front, near the display.

Firmly press down on the opposite edge of the cover until it clips into place.

Make sure the battery cover doesn't pinch the battery cables—they should be routed under the cover and angled inward.