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Using the ac power adapter
The power to run your computer can come either from the lithium-ion (Li-ion) battery pack provided with it,
or from ac power through the ac power adapter. While you use ac power, the battery charges automatically.
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 severely damage your computer.
Connecting the ac power adapter
To connect the ac power adapter, do the following:
Note: Ensure that you perform the actions in the order in which they are listed..
1. Connect the power cord to an electrical outlet.
2. Connect the power cord to the ac power adapter.
3. Connect the ac power adapter to the power connector of the computer.
Tips for 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 you are using
ac power.
• Before you charge the battery, ensure that its temperature is at least 10°C (50°F).
• You can charge the battery when the computer is connected to ac power and the battery is installed.
You need to charge the battery in any of the following situations:
– When you use a new battery.
– When the battery icon in the Windows notication area shows a low percentage of battery power
remaining.
– When 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, 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 six hours. This is affected by the battery size and the physical
environment.
Note: To maximize 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.
Chapter 2. Using your computer 23