Clip+ doesn't turn ON while in USB port (charging)

I’d love to know how you use yours Miikerman, to get 10 hours!

I have two Clip+s and both top out at around 6 hours (4 - 6 hours is closer to the range) - they were refurbs so I thought it was the price I paid for getting refurb, but then I got the ClipZip, *new*, and it still gets about the same.  Listening to all the battery life comments on here, I’ve accepted the 6 hours is pretty normal.