Keep the battery on your feeder charged all year without swapping out batteries in the field. And because these 6-volt chargers run entirely off sunlight, recharging won't cost you a penny. The panels are weatherproof, rustproof and corrosion-resistant. Leads are 6-ft. long with alligator clip connectors. Dimensions: 5-7/8"L x 3-1/4"W x 11/16"D.