Avoid high temperatures
Modern smartphones are equipped with lithium-ion batteries, designed to be used between approximately 10°C and 30°C. When they are exposed to higher temperatures for a long time, they degrade more quickly. It is better to avoid placing a smartphone in direct sunlight, especially when it is charging. The worst overheating scenario combines sun, recharging, and demanding use: “when using your smartphone as a GPS over a long distance for example”, warns Olivier Simon. Or when you play with your smartphone while recharging it.
Since our skin temperature is high, especially in summer, it is best to avoid carrying a smartphone in tight pants or in the inside pocket of a coat. Conversely, in the heart of winter, when temperatures fall below 0°C, it is advisable to wear your smartphone close to your body to slow down battery wear.