Dell XPS 18 (1820, Early 2014) - Manual (Page 12)

12 │ Setting Up Your Computer
Battery-status light:
You can check the charge/power status of your computer by
checking the battery-status light on the side of your computer or the
icon on the screen when your computer is turned on.
Solid white light Power adapter is connected to the computer
and the battery is being charged.
Solid amber light Battery charge is low or critical.
Off Power adapter is connected to the computer
and battery is fully charged or power adapter is
not connected to the computer.
Battery icon displayed on the screen:
Battery icon Description
Battery is fully charged
Battery is charging
Computer is running on battery power and the
battery is discharging.
Computer is plugged in, and either no battery is
detected, or the battery isn’t working correctly.
Battery is low
Battery is critically low
NOTE: You can check exact battery charge by hovering the mouse
pointer over the battery icon.