Is the USB cable covered under warranty? My cable is really loose when plugging into my TP and it only charges if I hold it with my hand in a particular position. I tried another usb-mini to usb cable from my external western digital portable drive but that cable is really short but the connection is solid. Will I get the same charge using this cable? I'll have to chat with them and see if they can send me a new one. Anybody else have problems with their cables?