UTStarcom SideKick 3 Reference Manual page 16

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For efficient operation, charge your device nightly. If you plan to leave your device
Tip
unattended for an extended period of time, be aware that the battery will discharge
after two days if it is turned on and not attached to the charger. If your device does
fully discharge, simply attach it to the charger; all your data should be restored.
16 Device Basics
(the small round hole located on the upper right side of your device) and plug
the power cord into a standard electrical wall outlet.
The orange charge indicator light will go on and a lightning bolt icon
will appear over the battery icon in the title bar, indicating the charger is
connected and the battery is charging. Note that if your device has discharged
completely, it may take up to 15 minutes before you see any indication of
charging on the screen.
Let the device charge for at least four (4) hours, until fully charged.
Rest the device in a safe place and let the battery charge for at least four
hours. When you first receive your device, you must fully charge the battery for
the system to perform battery-reading calibration and deliver full capacity.
As the device is charging, you will see the bars in the battery icon fill
repeatedly from left to right. When your device is fully-charged, the lightning
bolt icon will disappear and the bars will stop moving and remain in the filled
position.