Cause:

After the hotspot function is enabled, your phone will send signals to other devices to enable them to detect and connect to your phone. After other devices connect to your phone, your phone needs to receive and forward data. Therefore, power consumption increases after the hotspot function is enabled.

Solution:

To reduce the power consumption of your phone, disable the hotspot function after use. If you do not disable the hotspot function, it still consumes power even if other devices do not connect to your phone.