It is normal for a mobile phone to consume between 3% and 10% of its power during a night of standby.
However, the specific power consumption depends on the phone's Settings, connection to the network, and so on. If the wifi is connected and the background refresh is turned off, the standby power consumption will be less at night, if the background refresh of all applications is turned on and the 4G network is used, the power consumption will be increased, you can try to turn on the flight mode at night when sleeping to reduce the power consumption.
About 1% in standby mode. Maximum cannot exceed 3%