If you have a car that isn’t used often enough to keep the battery healthy, this is the perfect solution. It is a solar car battery charger that trickle charges when set in the sunshine. It can just sit on the dashboard or in the rear window and charge the car battery whenever it is not in use. An LED light blinks to indicate the charge. If you have problems with the battery gradually draining, this will keep it topped up. However it is not intended to recharge batteries that are totally flat or compensate for faulty batteries, so don’t expect miracles!
Alas, no longer available on Amazon – consider the Sunway solar car battery charger as an alternative.