it actually does kinda do that, a little, like if I turn off the battery the hub still powers the lights. but its very little, i kinda gauge it by how far it coasts, and it coasts forever. like the resistance is not noticable.
i mean, your flywheel should have equivalent resistance if that were powering the lights instead. so, yea. I wanted it to do a hard regen braking but the controller I have doesn't do that. even if not for the free power, I'd much prefer the e-motor to brake than just this janky (tho surprisingly sufficient) bicycle disk.