Auto Meter 9202 Battery Extender, 12-16 Volt, used to charge and maintain, Maximizes battery life, Approx Weight 3.2 pounds
Package Dimensions 10.9 x 8.9 x 2.8 inches, New, never used Lightweight And Compact Design. Portable and Easy To Store. Micro Controlled Charging. Keep Perfect Full Charge Battery. Dead Battery Warning. Continually Maintains. Will Not Boil Or Overcharge. Maximizes Battery Life.