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At higher than normal operating temperatures, for every additional 15Â°F (8Â°C) battery life is decreased by 50 percent. Therefore, continued operation at an average cell temperature of 92Â°F (33Â°C) will reduce battery life to 50 percent of that typical at 77Â°F (25Â°C).
The only way that a battery can freeze is if it is left in a state of partial or complete discharged. As the state of charge in a battery decreases, the electrolyte becomes more like water and the freezing temperature increases. The freezing temperature of the electrolyte in a fully charged battery is -92.0oF. At a 40% state of charge, electrolyte will freeze if the temperature reaches approximately 16.0oF.