Enable Power Saver Mode:

  1. Open the apps drawer
  2. Launch “Settings
  3. Scroll to “Phone” and tap “Power
  4. Tap “Power saver” and tick the check boxes associated with the power saving features you want to be enabled during Power Saver Mode
  5. Tap the switch to enable the option

Decrease Screen Brightness and Timeout Duration:

  1. Launch “Settings
  2. Scroll to “Phone
  3. Tap “Display & gestures
  4. Tap “Brightness level” and, if needed, turn off “Automatic brightness
  5. Drag the brightness slider to the left to decrease luminosity
  6. Go back to “Display & Gestures” and tap “Screen timeout
  7. Choose a lower timeout value and press “Back” to confirm

Disable Connectivity Options When Unused:

NOTE: By turning off the phone’s connectivity features when they are not in use, you might be able to improve battery life in the long run.

  1. Open “Settings
  2. Tap the “Wi-Fi” and “Bluetooth” switches to disable these features
  3. Tap “More” under “Wireless & networks
  4. Tap “Mobile network sharing
  5. Turn off “Mobile Hotspot
  6. Go back to “Settings” and scroll to “Personal” for GPS options
  7. Tap “Location” ( GPS), and then tap “Mode” and enable “Battery saving

Temporarily Switch to 2G Networks:

NOTE: If your phone runs low on battery and you don’t have quick access to a wall socket or battery bank, you can conserve the phone’s battery life until the next recharge by temporarily switching to 2G networks until the next recharge.

  1. Launch “Settings
  2. Tap “Mobile data” > “Network mode
  3. Tap “GSM only” to switch to 2G networks only

Minimize Third Party Applications Usage:

NOTE: Certain third party apps can perform regular background processes, and thus they can affect battery life even when they are not in use. By removing or disabling unused third party apps, you might improve battery life in the long run.

  1. Open the “Apps” drawer
  2. Go to “Settings
  3. Scroll to “Phone
  4. Tap “Apps” and swipe to “Downloaded
  5. Select an application and tap “Disable
  6. To remove the app from the phone, tap “Uninstall” > “OK

Change Sync Settings and Turn Off Background Data:

NOTE: By changing the sync settings of your apps / accounts to sync less data, you might improve battery life in the long run.

  1. Open “Settings
  2. Tap “Accounts & sync
  3. Select an app to change its sync settings
  4. For additional sync options, select an account

Check for OS Updates:

NOTE: Software updates can include battery life improvements, and as such it’s recommended to keep the phone OS up to date at all times.

  1. Launch “Settings
  2. Scroll to “Phone
  3. Tap “About” > “Software information
  4. Tap “Check now” and if applicable, follow the on-screen prompts to download and install any available updates on your phone

See More: HTC One A9s: Tips & Tricks to Improve and Conserve Battery Life