Please try the below:
1. Fast power consumption in a low-temperature environment:
Lithium batteries deteriorate in low-temperature environments, resulting in increased power consumption, which is normal. When the temperature returns to normal, the power consumption normalises, too.
2. Fast power consumption with 5G network:
When the phone uses the 5G network, the 4G network will be turned on simultaneously, so the power consumption will increase, too. You can turn it on or off as you need. (Path: Settings > Network & internet > SIMs > Preferred network type.
3. Fast power consumption after a system update:
Due to system integration and optimisation, power consumption increases after a system update. We recommend restarting the phone after the screen is off and charging it for a whole night after that. It will recover by itself after 2-3 days of normal use.
4. Check the power consumption details of the phone:
Go to Settings > Battery > Battery usage on your phone to check the power consumption details.