24: Detect whether your notebook is charging
As I'm browsing the very low-frequency bands, I had a strange problem: Sometimes, that would work okayish, sometimes I could even make out voices!
Other times, it wouldn't work at all, and everything would be loud noise. Even in regions where I had better reception before!
Just now, I found out how to solve that issue – by unplugging my notebook charger. D'oh! :D