1. Find "Power Manager"
Slide two fingers downwards starting from the top the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ccca704f-32ad-4d86-ae14-c27c00020151.png?width=206&height=366)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5b29490c-1a94-4866-900a-8045a77241d0.png?width=206&height=366)
Press Power Manager.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ebc1f62c-538a-4a96-9ade-e27dfac8d17a.png?width=206&height=366)
2. Extend the battery life
Press the indicator next to "Smart Power-saving" to turn on the function.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e8fd655e-f4fa-4424-885b-1e66c6cf9ffe.png?width=206&height=366)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-2e69d892-c5cc-4ede-8bfc-96e0e1e0f5c1.png?width=206&height=366)