HTC One M8 User Manual page 252

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Turn on Airplane mode when you don't need any wireless connections and you don't
want to receive calls or messages. For details, see
Manage Your Display
Lowering the brightness, letting the display sleep when not in use, and keeping it simple helps
save battery power.
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Use automatic brightness (the default), or manually lower the brightness.
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Set the screen timeout to a shorter time.
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Don't use a live wallpaper for your Home screen. Animation effects are nice to show off
to other people but they drain your battery. Changing your wallpaper to a plain, black
background can also help a little. The less color is displayed, the less battery is used.
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Set the Web browser to auto dim the screen while webpages load. Open the Internet
app, and then touch > Settings > Accessibility > Dim screen during page loading.
For more details, see
Manage Your Apps
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Install the latest software and application updates. Updates sometimes include battery
performance improvements.
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Uninstall or disable apps that you never use.
Many apps run processes or sync data in the background even when you're not using them. If
there are apps that you don't need anymore, uninstall them. See
If an app came preloaded and can't be uninstalled, disabling the app can still prevent it from
continuously running or syncing data. In Settings > Apps, swipe to the ALL tab, touch the app,
and then touch Disable.
Limit Background Data and Sync
Background data and sync can use a lot of battery power if you have many apps syncing data in
the background. It's recommended not to let apps sync data too often. Determine which apps
can be set with longer sync times, or sync manually.
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In Settings, touch Accounts & sync and check what types of data are being synced in
your online accounts. When the battery is starting to run low, temporarily disable syncing
some data.
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If you have many email accounts, consider prolonging the sync time of some accounts.
In the Mail app, select an account, touch > Settings > Sync, Send & Receive, and
then adjust the settings under Sync schedule.
Settings
Display & gestures Settings.
Airplane Mode.
Uninstall Third-party Apps.
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