That cigarette lighter receptacle will become more useful as time goes by. Carry a 10-foot cord with you with lighter jacks on both ends. As your battery runs down, ask someone at a local qwick-stop store for a battery recharge: His truck's cig lighter to your cig lighter.
Brag about your bike and all it can do and get free electricity on the road at the same time. The more you can talk about guns and sports, the more charge time you will get. (Just make sure the wire gauge is large enough so that it does not get too hot during the electron transport.)
I'm looking at this for myself. If I had a battery to put out 55 watts of headlight power and on-the-road recharger, I'd look at a set of over-the-road truck brake lights, the LED type. They take little power and can be seen half a mile away. My idea is to mount three of them, side by side, across the back. I intend to be seen!
MikeJ