Schumacher EC-4000-USB 4-Ah Large Emergency Glove Box Charger with USB Port
Never be stranded again.  This great little unit allows for safe charging of your battery without leaving the safety of your automobile.  Don't ask strangers for a jump again.  Plug the EC-4000-USB into your DC power port of your car, wait 15 - 20 minutes and drive away,just that simple!