system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come a remote with batteries that are almost dead, starts working when you slap it ?
gpt
The ends of batteries get oxidized of time. This causes a 'coating' that doesn't transfer current between the battery and remote. When hitting it, or just fumbling with the battery. The battery moves and reconnects with the metal that it transfers its current to in a different position. Which can help work around that coating.