How to Protect Your Car's Battery from Extremes of Heat and Cold

Your car's battery has one job: to provide a short burst of high-powered energy to start your car's engine via the starter and ignition systems. It does this by using two metal plates immersed in strong sulfuric acid.
Eventually, the battery runs out of juice and has to be replaced approximately every three to five years. Extremes of ambient temperature can accelerate this process.