Chapter 2. Learning the basics13Using AC adapter and battery ----------------------------------------------- Checking battery statusYou can determine the percentage of battery power remaining by checkingthe battery icon in the notification area. Charging the batteryWhen you find that the battery power is low, you need to charge thebattery or replace it with a fully charged one.You need to charge the battery in any of the following situations:• When you purchase a new battery• If the battery status indicator starts blinking• If the battery has not been used for a long timeNote: As each computer user has different habits and needs, it is difficult to predicthow long a battery charge will last. There are two main factors:• The amount of energy stored in the battery when you commence work.• The way you use your computer: for example, how often you access thehard disk drive and how bright you make the computer display.