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Dell Latitude E6440 Owner's Manual

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Battery status lights

If the computer is connected to an electrical outlet, the battery light operates as follows:

Alternately blinking amber light and white light
An unauthenticated or unsupported non-Dell AC adapter is attached to your laptop. Re-plug battery connector, replace battery if the issue reoccurs.
Alternately blinking amber light with steady white light
Temporary battery failure with AC adapter present. Re-plug battery connector, replace battery if the issue reoccurs.
Constantly blinking amber light
Fatal battery failure with AC adapter present. Fetal battery, replace the battery.
Light off
Battery in full charge mode with AC adapter present.
White light on
Battery in charge mode with AC adapter present.

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