I'm big into using whatever's already lying around for amateur radio, and the laptop batteries complete with an external charger—for a laptop I no longer use—weigh heavy on my mind each time I change out the (8!) AA batteries for the Rockmite 20. Well, I was finally able to put them to use . Unlike a two terminal AA battery, the MKFVP battery has a whopping 9 connector slots. I measured voltages between slots to no avail, I couldn't fine the advertised 11.4 volts I'd hopeed for. Then, the article at https://www.electroschematics.com/laptop-battery-secrets-part-1 came to my rescue. The article was about all manner of laptop batteries rather than my specific one, but that was enough. The author also noted that the outside terminals of laptop batteries are usually the power delivery leads analagous to the two terminals of a AA battery. I'd measured the voltage between those two connector slots already, and there was nothing... zero volts. However, the author also me...