My X6100 started freezing up its user-interface. This happens sometimes when the radio board shuts off, but the UI board hasn’t yet. It would happen when I was transmitting, even very low power, 2W. It even did it after a long time just listening.
I unplugging the USB-C from the computer, and it would allow the UI to shutdown, so the USB-C was powering the UI board, while the radio board had shutdown. The internal battery indicator looked like it may have shown low for a moment, but I was on 12V.
I finally realized I had enabled battery charging all the time. Charging the mostly-worn-out battery caused this new shutdown problem. I disabled charging, and now the radio is running fine again.
I ordered 2 new internal battery packs from Amazon to install. I used to be able to run the radio on internal battery for a little while, but now as soon as I unplug external power, the battery will read something terribly low like 7% and about 6 volts.