Many readers will have at some time or another built their own lithium-ion battery ... has with this 48 volt pack. It’s based around an off-the-shelf kit aimed at the e-bike market, but it ...

While most of the propulsive bits are left exposed, the tank up top houses a 400-amp controller as well as a BMS (battery management ... some sweet sweet 48-volt motorized bicycle action.

It’s not a project for most people, but watching someone ride up to 20 miles, and up to 30 mph, on tossed-out vape batteries ...