Likewise, Mac. It seems that perhaps a new batt cap would be an answer.
Feeling just a tad nervous about mine now, but I had intentions to USB it, at least for awhile.
They sent me a new cap at first, ended up being on the mod end, so got the whole thing replaced. No hassle with MVS. I'm just going to be SUPER, EXTRA, CAREFUL, when changing batteries, and perhaps do more in mid USB charging on this one.