HTC One M9 - Manual (Page 124)

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 the display and data connection.
1. From the Home screen, tap > Settings > Battery Manager.
2. Tap the Power saver On/Off switch to turn power saver mode on or off.
If you want to choose which phone features to conserve power for, tap Power saver.
If power saver mode's Data connection option is selected, HTC One M9 automatically
disconnects from the mobile network after 15 minutes when the screen is off and the data
connection is idle (no download activity, streaming, or data usage). It reconnects and then
disconnects periodically when the data connection is idle to save battery power.
Keep in mind though that the Sleep mode option for the data connection in Settings > Power,
when enabled, overrides power saver mode.
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 > Settings > Battery Manager.
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 M9.
HTC One M9 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 123.
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 181.
124 Power and storage management