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Because the data and files you save on your device are stored in RAM, maintaining a
continuous power supply to the device at all times is extremely important. If your device runs
out of power, all information stored in RAM is lost. The preinstalled programs will not be deleted
even if your device suffers a loss of power; however, any custom settings and programs you
have added will be erased.
To safeguard data against loss in the event of power failure, you can save or back up files to NAND Flash
memory(called “File Store” here).
The lithium-ion battery pack provides power to your device while it is not connected to ac power.
Actual battery life will vary depending on how you use your device. Some functions, such as
listening to music, using the backlight, or operating mini SD cards, use considerable power and
may reduce this time significantly.
The battery is charged whenever your device is connected to an ac power source—either the
AC adapter or the USB cradle. Usually, it takes 3.5 hours to charge your battery fully
depending on the battery status. Connect your device to AC power or place it in the cradle
when it is not in use, to ensure that the battery is fully charged when you need to take it with
you. When the battery is fully charged, charging stops automatically; the battery will not
overcharge even if it is left upon being connected to AC power.
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