High-Temperature Usage Safety of Power Banks
High-temperature environments pose a serious threat to the safety of power banks, as excessive heat can accelerate the internal chemical reactions of lithium-ion batteries, leading to battery degradation, leakage, or even thermal runaway—an uncontrollable chain reaction that can cause fire or explosion. Unlike low-temperature effects, which are mostly temporary, high-temperature damage to power banks is often permanent, reducing the battery’s cycle life and long-term capacity irreversibly. The ideal operating temperature for power banks is between 0°C and 40°C, and when the ambient temperature exceeds 40°C, the safety risks begin to increase significantly.When the temperature is between 40°C and 50°C, the internal chemical reactions of the battery accelerate, leading to gradual degradation of the electrode material and electrolyte, which shortens the battery’s service life. At this temperature range, the power bank may also activate thermal regulation mechanisms to reduce the charging