system
Given the following post, respond as if you're commenting on Reddit:
human
Why can I reverse "dead" batteries in my remote and get months of extra life out of them?

when the batteries in my remote control die, I swap the positions and my remote works for a couple months, then I switch them again and get a couple more months. I have done this about five times with the same two AA batteries.
gpt
There is a small amount of electrical resistance between the battery itself and the metal it makes contact with in the remote. This resistance is partly caused by a very thin film of non-conducting material that builds up between the battery and its contact. When you pull the battery out and replace it your are scraping off some of this material and causing there to be lower resistance at the contact. 

There is also unlikely any need to swap them. You could almost certainly obtain the same effect just by pulling the batteries out and placing them back in their original positions.