# 1
Kat's Heaters Thermal Battery Wrap for Series 24, 24F, 27, 27F, 74 Batteries - 125V - 80 Watt
I used this through a winter in the north where it regularly is at subzero temperatures. Truck always started without any issues. I also had heat pads on the oil pan and transmission that I bought from etrailer. At -40+ degrees the truck always started relatively easy.
Already had one and it works great, really helps save your battery on cold days and makes starting/cranking speeds faster instead of the slow crank you get when your battery is cold, i consider it a must have for winter where we get to -20 easily. The last one I got was from another site and cost at least 20% more there, so definitely happy I could get the same product for cheaper here.
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