For their senior design project at Arizona State University, these guys built a regenerative braking system for their bike. As they brake, the system spools up to give them a push back up to speed.

Heat, friction, poof, gone. Regenerative braking is the cheat code. Instead of losing energy when you slow down, your electric bike grabs it back and puts it into your battery. The motor reverses ...

We’ve partnered with the company to bring you this brief overview of regenerative braking, covering the basics of how these systems work ... slowing the wheels’ rotational speed – and ...