What effect does extreme cold have on a battery?
The amount of power a battery can produce is greatly reduced by the cold. At 0 Fahrenheit (-17.8 Celsius), a battery will deliver only about 40 percent of the power it would at 80 Fahrenheit (26.7 Celsius). The slowing effect that cold temperatures have on a fully charged battery are not permanent. If a battery is not fully charged, however, the electrolyte can freeze and damage the plates or crack the container. Batteries at usable states of charge will not freeze at temperatures above ?20 Fahrenheit.
