ViewSonic VB70a Pro User Manual page 26

At this moment, the "power usage" screen will list the applications which
are consuming battery power in descending order. The consuming chart in
the top of screen will display the consumption rate since the last charge of
the MID, it will also display the length of time by using the battery for
running.
To touch the application of "power usage" on the screen, you will know
about the power consumption details. The information types are different
for different applications. Buttons which included by some applications
can open a screen, which provide some settings to adjust the application's
power consumption.
To touch the power charge, you can open a screen, which will detailed
display when the wireless device of the MID, screen and other functions
use the battery.
Development
Including the settings for developing Android applications.
USB debugging
To select this option means the debugging tools on the computer are
allowed to communicate with MID through the USB connection.
Keep the arousal status
Selecting the option to prevent the system from darkening and locking the
screen when charging between MID and charger or USB device
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