HTC One M8 - Manual (Page 51)

Tips for extending battery life
How long the battery can last before it needs recharging depends on how you use
HTC One. HTC One power management helps to increase battery life.
If you like more control by tweaking settings on your own, try out some of these
battery saving tips.
Check your battery usage
Monitoring your battery usage helps you identify what's using the most power so you
can choose what to do about it. For details, see
Checking battery usage on page 49.
Manage your connections
§ Turn off wireless connections such as mobile data, Wi-Fi, or Bluetooth when not
in use.
§ Turn GPS on only when a precise location is needed, such as while using
navigation or location-based apps. See
Turning location services on or off on
page 158.
§ If the Sleep mode option in Settings > Power is enabled, at low peak times, your
phone will turn off the data connection after the screen has been off for 15
minutes and there's no network activity (no downloads, streaming, or data
usage). The data connection resumes when you switch the screen back on.
§ Turn on Airplane mode when you don't need any wireless connections and you
don't want to receive calls or messages.
Manage your display
Lowering the brightness, letting the display sleep when not in use, and keeping it
simple helps save battery power.
§ Use automatic brightness (the default), or manually lower the brightness.
§ Set the screen timeout to a shorter time.
§ 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.
For more details, see Settings and security on page 182 and Personalizing on page
53.
51 Your first week with your new phone