Hey, it may not be the coolest looking thing in the world, but the newfangled Rubbee electric ... 14.4-volt battery pack. The doohickey presses the roller against the back tire of the bike ...

[Tom Stanton] wanted to see if supercaps have any practical use on e-bikes, and built a DIY electric motor in the ... the motor up to a conventional battery, he did find that it was quite usable ...

Looking to demonstrate the capabilities of one of these rebuilt alternators, [DIY King] bolted one to the back of a old bicycle and got ... a custom 1,500 watt-hour battery pack that lives in ...