A kit contains two 18650 rechargeable batteries (3.7V, 3400mAh, li-ion, pointed head, no protective board) and a charger (USB powered). Click the green "Clone or download" button, then click "Download ...

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 ...

I started to design a simple 4in1 PCB for charging 18650 cells while looking at my actual charging rig attached to some wood! Some time ago, i teached myself to design PCBs for hobby use. I really ...

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 cell, and a rocker switch to connect it ...