What is the function of the lights on the side of the battery on a PowerBook G3 Series computer?
The four lights on the outside edge of the battery are the battery charge indicators. By pressing the button next to the lights, you will see how much charge is left in the battery. The battery indicates how much it is charged in one-quarter increments, from 25% to 100%. These lights also illuminate when the system is plugged into AC power and is charging, to let you know how much the battery has charged over a period of time.
