Zte k88 User Manual page 111

internal storage or the installed microSDHC card.
Touch Tablet to get a detailed breakdown of space usage.
For more information about using the internal storage and the
microSDHC card, see Using the microSDHC Card as Portable
or Internal Storage.
Battery
Touch the Home key >
battery level, check what has been using the battery, and
optimize battery use.
Touch an app or service to adjust its settings in order to save
battery life. For example, touch Screen > Reduce the screen
brightness and/or screen timeout to change screen
brightness and sleep.
Touch > Battery optimization. Battery optimization helps
prolong battery standby time when you're not using the tablet. If
there are apps that you don't want battery optimization enabled,
you can turn the feature off in those apps. Just touch Not
optimized > All apps, touch the app name and then touch
Don't optimize > DONE.
Apps
Touch the Home key >
installed on your tablet and manage them.
Touch an app to see its information. The following options may
be available:
> Settings > Battery to view the
> Settings > Apps to see apps
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