What do the battery light indicator colors mean on the HP EliteBook 840 G5?

When AC power is connected, a white battery light means the charge is greater than 90 percent, amber means the charge is between 0 and 90 percent, and off means the battery is not charging. When AC power is disconnected, a blinking amber light means the battery has reached a low level, and rapidly blinking amber indicates a critical battery level. (Page 18)