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Yes. Summertime heat can affect your battery worse than the winter cold. Most batteries fail in the month of July than in January, because of the heat.

Heat is a killer of all batteries and high temperatures cannot always be avoided. This is the case with a battery inside a laptop, a starter battery under the hood of a car and stationary batteries in a tin shelter under the hot sun. As a guideline, each 8°C (15°F) rise in temperature cuts the life of a sealed lead acid battery in half.

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Q: Does extreme summer heat affect car battery life?
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