Kat's Heaters Battery Heating Pad for Series 27, 31, and 40 Batteries - 120V - 60 Watt
Code: KH22500
Place this flexible heating pad under your vehicle's battery in the winter to maintain its charge and to ensure that your engine turns over. Measures 11-1/2" long x 8-1/2" wide. Plugs into 120-volt outlet.