Originally Posted by
Grey.
As for charging it the old fashioned way, the SRAM group uses a seperate battery for each derailleur, that's two batteries to keep charged. My main concern is it dying in the middle of a ride, or getting wet.
I'm sure it's weatherproof and that you'll get many rides before charging is needed.
My Garmin lasts 8-10 rides before needing a charge.
I also like Sram's shifting. Right shifter downshifts, left shifter upshifts and press both to change the chain ring.