How low can you go?
I’ve been recycling the battery. Apparently it gets better every time. I found listening to AM broadcasts kind of achieves the goal of draining the battery pretty well. A reasonably strong AM station sounds good on the internal speaker. If I do a lot of shortwave listening I’d use an external D.C. power supply. The internal battery is for communications in the field.
Plugging in a 13.8 volt D.C. supply and setting >CHG in the menu, allows charging. It’s now ready for the weekend in case I want to get out and play radio!
This morning, I took note of the voltages after charging :
That’s it. Those are the figures.