Extreme heat and cold are hard on automotive batteries. Heat from the summer increases the internal battery temperatures allowing the lead plates to corrode and deteriorate. The higher the internal battery temperature plus the number of times the battery reaches a high internal temperature affects and reduces battery service life. BAM! in comes Cooler Weather . The cooler the ambient temperature (below 26 C) the more energy is required from the battery in order to start a vehicles engine. Cooler temperatures also result in a reduction of the battery’s recharge efficiency, and increasing the risk of failure. Don’t get stuck out in the Cold – Have your Battery and charging system tested spring and fall.