I bought two of these and hardwired them in two different vehicles.  The USB charging ports charge and power every device I've tried.  The quality of everything is very high, this includes the cable, cig. lighter plug, and the unit itself.  The fuse in the rear of the unit makes it an excellent placement if you hardwire it.  To hardwire it, get a "add a fuse" and a "cigerate lighter splitter adapter".  Chop off the sockets.  This is cheaper than getting a single socket with bare cable.  Strip and crimp the center wire (positive and usually marked with a strip or white marks on the cable but use a DMM to make sure) to the "add a fuse".  In the vehicle, find a fuse that is same or of higher amperage than the fuse with the "add a fuse".  Remove it and insert the "add a fuse" and insert the removed fuse in the "add a fuse".  Strip and run the other wire to ground (bolt or screw or something that is grounded).  Route the cable of this charger to the socket and insert.  If you want the charger to turn off with the car, find a fuse of a device that will turn off with the car or if you want to leave it on all the time (may not be a good idea) find one that stays on all the time.