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Shimano had something similar years ago. 2011 it was filed, in fact.
https://www.bikeradar.com/features/shimano-electronic-gears-could-soon-charge-themselves/
hippy-
HA!
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I remember that, and Shimano patenting the remote shifting buttons as well.
Odd that the climber/sprint shift buttons are a tightly held patent, but Shimano can’t prevent this. Or maybe their lawyers haven’t seen it yet.
All three groupset makers patent stuff they have no interest in making. Either because it needs 10 years of refinement or just so a rival can’t make it.
JVBulman
davidual
It's just a patent, but SRAM is apparently working on a self-charging wireless rear mech with a tiny dynamo in the upper pulley.