Why does Huawei p9 plus automatically shut down?

Did you press the power button by mistake? Press and hold the power button for more than 10 second, and the phone will be turned off and restarted. Please keep your mobile phone fully charged. When the battery is low enough, it will automatically shut down.

Please check whether the time switch machine function is turned on. Please click "Settings > Intelligent Assistant > time switch machine" to check whether the "Timed Start" and "Timed Shutdown" switches are turned off.

Overheating the phone can also lead to automatic shutdown. Huawei mobile phone has built-in thermal protection function. After using a high-load program for a period of time, if the motherboard temperature is higher than a certain level, it will automatically shut down.

If the ambient temperature of your mobile phone is too low, it may also cause the chemical activity of the battery to deteriorate, the battery is not durable, and it is easy to turn off automatically when the battery is low.