Coleman CL-100 72000 1.5-Watt 15-Volt Solar Panel Battery Trickle ChargerProduct Review

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For use indoors or inside your vehicle conected to the power outlet/cigarette lighter

Extends battery life using the sun's power

Reverse current protection (won't drain your battery at night)

Maintanes the charge on your vehicle's battery when not in use

Comes with cigarette lighter connection and alligator clips