On 2018-02-17 10:31, Jeff Liebermann wrote:
On Fri, 16 Feb 2018 09:27:28 -0800, Joerg
wrote:

On 2018-02-15 11:03, wrote:
Have you ever ridden or lived with a bike with electronic shifting?
I doubt it.

No but I have met a guy who had a battery fail mid-ride and then the
front DR quit. Which was just peachy in the mountainous region.

I don't see a problem:
https://www.google.com/search?q=usb++hand+crank+charger&tbm=isch
https://www.ebay.com/sch/i.html?_nkw=hand+crank+usb+charger
Or, build your own:
https://www.youtube.com/watch?v=RXmqs8DIHf8 (4:04)



You could also strap a little Honda generator onto the rear rack.

--
Regards, Joerg

http://www.analogconsultants.com/