Clearly something is up with the phone, I have turned it off and taken out the battery to no avail. Only think I have changed is install beatiful widgets since the last time I charged and everything was OK.
itxtme: I know that USB chargers often dont have enough grunt to supply sufficient power to charge the units. This is especially true of laptop models. My Ipad for example does not charge on USB and another example would be the kindle that charges VERY slowly on the USB compared o USB wall socket. Plug it into the wall socket and see if the more grunt fixes your problem! Are the X5's even meant to be charged via USB? Or is that more for synchronizing etc?