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1. Creat good thermal environment When using the laptop in a high temperature, we should put the laptop ac adapter in a place that have no direct sunlight and ventilate, remember don't put the AC adapter near the air vents of the laptop, this the AC adapter will absorb heart instead of cooling. In summer, we can lit side the AC adapter to increase the contact area of AC adapter and air, then let the AC adapter's heart distribute well. In order to obtain better heat dissipation, we can also put a plastic block or slug to increase the air convection speed near the AC adapter, speed up the distribution of AC adapter's heat.

2. Stop using it when occuring abnormalities When the AC adapter appears big noise even fume, we should stop using it immediately, it must be inspected by professional people before use.

3. Reasonable charge When the laptop battery is charging, you'd better not run big 3D games or other program that will make the laptop overload carring, this will lead to the AC adapter's output power surplus not enough and cause charging the battery get slower or can't full charge the battery, make the AC adapter in overload working.

4. The different laptop models's AC adapter can't be mix used The different brands laptop has differences in output interface, voltage and current value, so they can't be mix used, otherwise, it will cause can't full charge the battery and the screen flashing, even lead to burn down the laptop's motherboard and other hardwares. We should also careful when change using the same brand but different models laptop AC adapter, it suggested that we should consult the professional engineer before using.