It seems to change. For a couple of days, it couldn't charge and all. Even turned off, it would stay at 6% when plugged in. Cycled all of the radio devices on/off and it got to 25% but wouldn't go higher. Did one more cycle on/off of Bluetooth, and it went to full.

I'm blaming Bluetooth because it has been going to full charge fine for a few weeks and I turned Bluetooth back on to connect some headphones and the pattern repeated.