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The ac power adapter that comes with your computer has two basic components:
• The transformer pack that converts ac power for use with the computer.
• The power cord that plugs into the ac outlet and into the transformer pack.
Attention: Using an improper power cord could cause severe damage to your computer.
Connecting the ac power adapter
To use the ac power adapter, do the following. Be sure to take these steps in the order in which they are
given here.
1. Plug the ac power adapter into an ac outlet.
2. Connect the power cord to the transformer pack.
3. Insert the power jack into the computer.
Tips on using the ac power adapter
You can check the status of your battery at any time by looking at the battery meter at the bottom of your
display.
• When the ac power adapter is not in use, disconnect it from the electrical outlet.
• Do not bind the power cord tightly around the ac power adapter transformer pack when it is connected to
the transformer.
• Before you charge the battery, ensure that its temperature is at least 10°C (50°F).
• You can charge the battery when the ac power adapter is connected to the computer and the battery is
installed. You need to charge it in any of the following conditions:
– When you purchase a new battery.
– The percentage of power remaining is low.
– The battery has not been used for a long time.
Charging the battery
When you check battery status and nd that the percentage of power remaining is low or when the power
alarm alerts you that the remaining power is low, you need to charge your battery.
If an ac outlet is convenient, plug the ac power adapter into it, and then insert the jack into the computer.
The battery will be fully charged in about 3 to 6 hours. This is affected by the battery size and the physical
environment.
Note: To increase the life of the battery, the computer does not start recharging the battery if the remaining
power is greater than 95%.
Maximizing the battery life
To achieve the best balance between performance and power saving, adjust your power plan settings.
To access power plan settings, do the following:
• Use the battery until the charge is completely depleted.
• Recharge the battery completely before using it. You can see whether the battery is fully charged from the
battery status icon in the Windows notication area.
• Always use power management features such as power modes, screen blank, sleep, and hibernation.
26 User Guide