French researchers have announced a prototype of an 18650 sodium-ion battery. If you’ve bought a powerful LED flashlight, a rechargeable battery pack, or a–ahem–stronger than usual LASER ...

Vaping devices that perform at a high level frequently draw their power from batteries, specifically the 18650 models ... of a protection circuit board (PCB) or battery management system (BMS ...

Draining a battery is easy ... a fairly simple PCB, four ceramic power resistors, a holder for a single 18650 cell, and a rocker switch to connect it all together. But wait, what’s that a ...