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NEXUS 7 GUIDEBOOK TUNE PERFORMANCE 44
need to sync manually to collect messages, email, and other
recent information, and won’t receive notications when up-
dates occur.
• If you know you won’t be near a Wi-Fi network for a while,
switch to Airplane mode: press and hold the Power button, or
go to Settings > Wireless & Networks > More > Airplane mode.
Check battery level and usage details
Open Settings > Device > Battery.
The list at the bottom of the screen shows the breakdown of bat-
tery usage for individual apps and services. Touch a graph for
more details. The details screen for some apps includes buttons
that allow you to adjust settings affecting power usage, or stop
the app completely.
WARNING: If you stop some apps or services, your device
may not work correctly.
Battery status (charging, discharging) and level (as a percentage
of fully charged) are displayed at the top of the screen.
The discharge graph shows battery level over time since you last
charged the device, and how long you’ve been running on battery
power.
Optimize data usage
Data usage refers to the amount of data uploaded or downloaded
by your device during a given period. To monitor your data usage,
go to
Settings > Wireless & networks > Data usage.