I installed an Eklipes Cobra power source on my bike. It has 2 power ports, a cigarette-lighter style and a USB. Very simple, as it uses a standard SAE battery pigtail -- what you'd use to attach a trickle charger. Hook it to the battery, run the wire to wherever you mount the unit, you're done. This unit has a switch on it, so you can use it whether the bike's running or not -- but I always switch it off whenever the bike's not running.