If the laptop is powered by an external power source for a long time, or if the battery level has exceeded 80%, immediately remove the battery. Normally, there is no need to fully charge the battery, it can be charged to around 80%. Adjust the power options of the operating system to set the battery level alarm to above 20%, and the minimum battery level should not be lower than 20%.

　　2. Small electronic devices such as mobile phones should immediately disconnect the power cord (including the USB interface for charging function) after charging, as continuous connection can damage the battery. You need to charge it frequently, but you don't have to fully charge the battery.

　　3. Whether it's for laptops or mobile phones, be sure not to let the battery run out (automatic shutdown).

　　If you want to travel, you can fully charge the battery, but if conditions permit, charge the electrical appliances at any time.

　　5. Use a more intelligent and power-saving operating system.

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