Electronic & Hydraulic Shifting (Di2, Ui2, customisations)

No idea, from memory it's a 7.4v Li-ion battery, mine lasted for an entire year.

Apparently the front shift is much more energy intensive than the rear, so if I'd ever used the inner ring that lifespan might have been reduced.

I was thinking about the same set-up as those Reelights. Probably not much power to be had. But maybe enough to trickle charge a small battery. Probably not really a marketable idea for the top end roadie crew. But I reckon it would appeal to electric alfine users.

#appliesforpatentandquitsjob