Well, since I rarely drive my truck, it does from time to time, and I got tired of it, currently it is in a borrowed trickle charger. I have to run a cord out to the truck so I want something to sit under the hood safely. Someone suggested a solar-powered unit. Opinions? What are you using? Best place to buy one cheap? Battery Tender Junior - 12V @ 0.75A [BAT021-0123] - $39.95$29.95 : MarylandSpeed.com- Your First Stop on the Way to Performance!