If the main battery is critically low, the device enters "sleep" mode and the device turns off.

NOTE: To prevent data loss, a portion of the main battery will keep data safe for 72 hours if your device enters sleep mode. An additional battery, the internal backup battery, is designed to keep your data safe when you remove the main battery. The internal backup battery will keep data safe for 30 minutes.

To recover from a critically low battery:

1Plug in the AC adapter or replace the main battery with a charged battery.

2Press the power button to turn on the device.

By default, the device turns off if the device is left unused for a period of time. This is called the sleep mode. For information on setting the amount of time during which the device can remain idle before it turns off, see "System Tab" on page 82.

Checking Battery Power

You can check the battery power status with the power button light.

Battery Status

Power Button Light Status

 

 

Fully charged battery (and

Solid green

connected to external power)

 

Low charge

Blinking amber

In the process of charging

Solid amber

Notification relay

Blinking green

 

 

Getting Started

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Image 51
Dell HC03UL, HD04U owner manual Checking Battery Power