Draining a battery is easy. Just put a load across the ... a holder for a single 18650 cell, and a rocker switch to connect it all together. But wait, what’s that a TP4056 charging module ...

Many readers will have at some time or another built their own lithium-ion battery ... 18650 cylindrical cells, as [limpkin] has with this 48 volt pack. It’s based around an off-the-shelf kit ...

This guide demonstrates the process of replacing the battery in a HILTI TE 2-A 24V lightweight cordless hammer. The case was ...