I woke up this morning to a totally discharged phone, though it was on the charge. Obviously my HTC One problem isn’t lint.
I went online and looked for a solution. I tried a battery recalibration, though I’m not sure what that is or what it does!
The phone is taking a charge now, but how long?
I’ve initiated a backup. If (when?) it stops charging again I’ll be in a better position to seamlessly swap phones.
Frustrating.
I suffered a problem like this on my Motorola Droid Razr. Turned out to be the charging cable (connector) making intermittent contact. So, I’d plug in and see the charge icon. Later, without noticeably moving the phone, charging would stop until I wiggled the cord. Hopefully you’ll see something similar?