If you’ve bought a powerful LED flashlight, a rechargeable battery pack, or a–ahem–stronger than usual LASER pointer, you’ve probably run into 18650 batteries. You often find these inside ...

At a glance we can see the major components you’d expect in a discharger: a fairly simple PCB, four ceramic power resistors, a holder for a single 18650 ... can discharge batteries and test ...

This innovative LHCE-GPE enables practical solid-state 18650 cylindrical lithium metal batteries to operate at 4.7 V, achieving a remarkable energy density of up to 250 Wh kg −1. Furthermore ...