Review on Battery Tender Female Cigarette Adapter Accessory Cable for Battery, Inverter, RV Mobile, Charger - Seamlessly Connects in-between! by Suhas Carney

Got one of these on my cruiser and am ready to add another to my sport touring bike. A few things to note: First, there are NO mounting hardware on this unit. The outside of the adapter barrel (1.055" OD on the main barrel) is covered with a plastic material so you can grip it securely with the right clamp. However, there is a larger diameter section at both the top and bottom of the barrel, so you can't just press fit it into the hole - you need something that goes around the main body of the barrel. 3/4" half-round plastic line clips (I bought Cantex 5133737B). They sit well on the barrel and have enough interference to keep it firmly on a flat surface. Then all you have to do is drill 2 holes and mount with SS 10-32 nuts and bolts or rivets. (I painted mine black since the ones I bought were light gray.) Works great! Second, the included little rubber cover is a little flimsy but seems to stay in place. Think about where you're going to mount it, as the cover will flap in the wind unless it's in the fairing or behind the windshield. This thing would be most amazing with a spring loaded hinged lid.