Learn how to save battery life on the HTC One M9.

Battery saving mode

1. From any Home screen, tap the Apps icon.
2. Tap Settings.
3. Scroll to 'PHONE' and tap Power.
4. Tap the Power saver switch to turn it on or off.

Battery saving mode settings

1. From any Home screen, tap the Apps icon.
2. Tap Settings.
3. Scroll to 'PHONE' and tap Power.
4. Tap Power saver.
5. Tap the Power saver switch to turn it off if you wish to edit the options below.
6. Select or clear the check boxes for the following options:
   • CPU power
   • Display
   • Vibration
   • Data connection
7. Once you have made your selections, tap the Power saver switch a second time to turn it on and save your settings.
8. Once saved, your Power saving settings appear grayed out and items selected have a white check over a green background.

Tips to save battery life

• Change application sync settings
• Lower screen brightness and timeout duration
• Toggle from 4G to 2G
• Turn off background data
• Turn off Wi-Fi, Bluetooth, GPS and Smartphone Mobile Hotspot
• Uninstall unused apps
• Update to the latest software

Set device to sleep when unused

Press and then quickly release the Power key to set the screen to sleep mode.