Having a few leftover 18650 batteries (about … too many), I decided to put them to use instead of recycling them, so let’s build a power pack. DISCLAIMER don’t do this unless you know what you’re doing. I’m not responsible for anything you might do wrong.
As you know, many/most transceivers want a 13.8 V input – charging voltage of a standard NiMH battery. This does not really match the modern world of LiIon/LiPo chemistry, on which a single cell can have between 3.3 to 4.2V – meaning an 3S pack would be 9.9 to 12.6V (too low) and an 4S…(Continue Reading)
Awesome, cheap, 10-ish watt HF transceiver with open-source software. Take a look at how I built mine.