You realise that you have to take the seat off, and hook it up to the battery every use right?The $18 one I posted is actually designed to charge phones/ipods while riding inside of a tank bag.Its even a quick connect for a battery tender.How about this; Enercell 12V/10A Vehicle Adapter Socket with Battery Clips : DC Car Adapters | RadioShack.com looks like it would be real easy and fast hookup.