Why does the POCO C61 consume the battery faster in high brightness and 90Hz mode?

High brightness and 90Hz refresh rate provide a better visual experience, however, they increase power consumption. To save battery, the default display settings are automatic brightness and 60Hz refresh rate. To conserve power, please enable the power-saving mode or lower screen brightness and refresh rate, and clear background applications.
Note:
The POCO C61 defaults to 60Hz. Only certain applications support the 90Hz refresh rate to ensure overall performance and the using experience.