Originally Posted by
braille_teeth
I just use airtags! But even at every 9-12 months, I just hate throwing a physical object away. The rechargables are very attractive! I'd guess if one wanted to really "close the loop" you could try charging off a dynamo hub but that seems.. potentially. silly and expensive.
If you are trying to charge up a small device, do it at home on a charger.
I use a dynohub for battery charging on bike tours. My last three bike tours (each was multi-week) I was 100 percent self reliant for electrical needs from the dynohub.
Even though I have the equipment for it, I would not try to use a dynohub to charge a small anti-theft device.