Battery Heaters Pad Style KTH22400 Five Star Manufacturing

Features & Benefits:

• Dimensions 5.5" × 8.5" 
• 120 volt,  60 watts
• Silicone covered, acid resistant, pliable
• Fits most car and truck batteries

If bottom of battery box is perforated with holes or has a waffle bottom use a sized piece of sheet metal or sheet aluminum between bottom of box and battery heater.