I'm a headset gadget nut, so I bought into the Discovery 640-series as soon as it came out. Plantronincs apparently cannot get it through their heads that the Discovery 640 series charger design is irreparably flawed. I spoke to a corporate rep just about an hour ago on the status of this, but all she would say is that their company acknowledges some "difficulties with early releases" of this product. Yet Plantronincs continues to use the same flawed charger design. As MANY frustrated users have noted, the headset does not stay well connected inside the slipcase-style charger/case. Like others, I've tried tape, rubber bands, and everything I can think of, but to no avail. I plug it in, see the red charging light, but when I come back 10 or more minutes later the light is out (if the charge were complete it would turn blue) and I have to jiggle it to get it to keep charging.