I have the Lapdock 500 and use it for 1 or 2 hours daily. After a while of use the phone heats up and the battery begins to lose charge (and of course stops charging). I do not know anyone else that has this combo of Droid4 with Lapdock 500 so thought it best to "throw it out there" and see if anyone else has a similar experience or idea on how to keep the phone from discharging while in the Lapdock.