Thunderbolt Solar 1.5 Watt Solar Battery Maintainer

Keep your vehicle’s battery topped off with this solar battery maintainer. Designed to compensate for small, steady battery drains from the vehicle’s clock or alarm system, this solar charger mounts easily to the windshield or dash and conveniently plugs into your car’s 12 volt cigarette lighter port. With an amorphous crystal solar array, this solar charger provides superior performance in bright sun and in partial shade.