How Extreme Cold and Heat Impact Your Car Battery

In a perfect world your car battery performs flawlessly year-round. We here at C.H. Urness Motor Company have heard enough stories to appreciate just how fickle your car battery is. We also know exactly why your car battery misbehaves in extreme weather. Here's the short of it.

Hot, Dry and Fast

Your car battery contains lead plates in an electrolyte solution that produce a charge to feed the starter and, in turn, the engine. Extreme heat speeds up this process, battery corrosion and the evaporation of crucial battery fluid levels. Low battery fluid levels and internal corrosion cause your battery to be sluggish and unpredictable.

Cold, Frozen and Slow

Extreme heat and cold both make your car battery sluggish, but for different reasons. As heat evaporates battery fluids, cold weather makes them slow and viscous. Slower fluid reduces the amount of current your battery can produce, forcing it to work harder. Depending on your car battery's Cold Current Amperage (CCA) rating, extremely low temperatures can cause your battery to slow until it dies.

Permanently sealed batteries don't require maintenance. If your car battery has caps, remove them to confirm fluid levels. During summer, store your vehicle in a cool, dry place. Before winter, get your battery checked to confirm optimal health.



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