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Message: <blockquote data-quote="Vollmer" data-source="post: 445643" data-attributes="member: 8014">Is there anything to worry about if the boat is left out in the heat?  Those battery compartments can get VERY HOT on those hot summer days.  Especially if the boat is sitting in the driveway for a few days. Google says: While lithium-ion batteries can perform well at slightly elevated temperatures, prolonged exposure to excessive heat significantly accelerates aging and reduces longevity, potentially leading to performance issues and even safety concerns. Here's a more detailed explanation:<ul> <li data-xf-list-type="ul">Heat and Battery Performance: Higher temperatures accelerate chemical reactions within a lithium-ion battery, leading to faster aging, reduced lifespan, and decreased ability to retain a charge over multiple cycles. </li> <li data-xf-list-type="ul">Safe Operating Range: Lithium batteries generally operate safely between 0°C and 45°C (32°F to 113°F). </li> <li data-xf-list-type="ul">Storage Temperatures: For storage, the recommended safe temperature range is typically between -20°C and 25°C (-4°F to 77°F). </li> <li data-xf-list-type="ul">Risks of High Temperatures: Prolonged exposure to high temperatures can increase the risk of thermal runaway (a chain reaction causing rapid temperature and energy release) and potentially lead to battery fires or explosions. </li> </ul></blockquote>