Posted on 9/26/2025
Corrosion on your car’s battery might seem like a minor issue, but it can quickly turn into a major inconvenience, particularly in cold weather. What starts as a bit of white or blue-green buildup around the terminals can interfere with your vehicle’s ability to start and charge properly. If you’ve ever turned the key on a frosty morning and heard only a weak click or sluggish cranking, battery corrosion may have been part of the problem. Knowing how corrosion forms, how it affects performance, and what to do about it can help you avoid getting stranded and keep your battery and charging system in good shape year-round. What Causes Battery Corrosion Corrosion develops as a result of the battery's natural chemical process. As the battery charges and discharges, it vents small amounts of hydrogen gas. When this gas mixes with moisture and the metal around the terminals, it forms acidic deposits. These deposits build up on the battery posts and ca ... read more