I am considering an anti-theft GPS tracker for my bicycle, but I am worried about battery life.
Are there any that recharge from a hub dynamo?
I use this product:
Since this is a tail light, it is less suspicious as a GPS tracker. You can simply charge and remove the USB cable as well.
(One thing to notice since this product is not inexpensive, I epoxied the screw just to be on the safe side :D )
For anyone without a USB 5V DC port from your dynamo hub:
or.. just search google for "Hub dynamo USB" if you are not from the UK :D
Most of the ones that I've seen are all battery powered – there is one, Shy Spy, that appears to have an inductive charger. The problem that I imagine with a dynamo powered tracker is that the power cable could lead the thief to the location of the tracker on your bike.
Another option would be to have the tracker generate its own power. The Connected Cycle Pedals do that.