Great game. It have a little bug on the gate. You use the gate's key but you dont pass.
I had that same bug, too. Wasn't even sure if it was a bug, but then the journal entry for the battery changed position. I was able to pick up another battery (even though it was no longer on the ground), and then disappeared when I walked between two buildings! Like, the camera just didn't move and I couldn't see her to get her lined up to come back out.