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 ...
By taking a 3D printed design intended to attach a TP4056 module to the end of an 18650 cell and combining ... range was good even with the built-in PCB antenna, but hacking on an external can ...
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