Some functions on your mobile phone use a lot of power and therefore significantly reduce the battery life. You can reduce the power consumption by turning on low power mode.
Step 1 of 4
Find "Battery"
Tap Settings.
Step 2 of 4
Find "Battery"
Tap Battery.
Step 3 of 4
Extend the battery life
Tap the indicator next to "Low Power Mode" to turn on the function.