HTC One A9 User Manual page 102

102 Power and storage management
Turning battery optimization off in apps
If there are apps that you don't want battery optimization enabled, you can turn the feature off in
those apps.
1. From the Home screen, tap
2. Tap Battery optimization.
3. Tap Not optimized > All apps to see the complete list of apps.
4. To turn off battery optimization in an app, tap the app name, and then tap Don't optimize >
Done.
Repeat this process to turn off optimization in other apps.
To filter the list and see which apps have battery optimization disabled, tap All apps > Not
optimized.
Using power saver mode
Power saver mode helps to increase battery life. It reduces the usage of phone features that drain
the battery such as location services and mobile data.
1. From the Home screen, tap
2. Tap the Power saver On/Off switch to turn power saver mode on or off.
To set when to automatically switch this mode on, tap Power saver > Turn on
automatically, and then select a battery level.
Extreme power saving mode
In times when you don't need to use much of your phone, turn Extreme power saving mode on to
extend battery life longer. In this mode, standby time can last longer than usual, and you can only
use the most basic functions such as phone calls, text messaging, and email.
1. From the Home screen, tap
2. Tap the Extreme power saving mode On/Off switch to turn extreme power saving mode on
or off.
If you want to set when to automatically switch this mode on, tap Extreme power saving
mode and select a battery level.
Tips for extending battery life
How long the battery can last before it needs recharging depends on how you use HTC One A9. Try
out some of these tips to help increase battery life.
Use the power management features
§ Turn Power saver mode and Extreme power saver mode on in Settings.
§ Monitoring your battery usage helps identify what's using the most power so you can choose
what to do about it. For details, see
> Settings > Battery Manager.
> Settings > Battery Manager.
> Settings > Battery Manager.
Checking battery usage on page 101.