Sansa clip won't charge

I also have a Sansa Clip. It would be an excellent choice for audiobooks if it charged correctly. I have 6 PCs including the one at work. it only charges on one of them. On that one, plug it in, connected shows up on display and stays up. Unplug it an hour or so later and you have have a charge that will last a couple of days. If I plug it into any other machine, connected shows up on the display and goes off a few minutes later. When I unplug it the clip is dead. I can plug it in with a partial charge and when I unplug it an hour later, the battery is dead. This is repeatable on any of 5 of my PC’s. Needless to say I just use the PC that charges it. I feel for people who do not have a wide variety of PC’s to try.