Using The Ac Power Adapter - Lenovo ThinkPad X1 Carbon User Manual

– How often you use the wireless features.
To check for detailed battery status information, do the following:
• For Windows 8.1: Start the Lenovo Settings program and click Power.
• For Windows 7: Start the Power Manager program and click the Battery tab.
Enabling the battery alarm on the Windows 7 operating system
For the Windows 7 operating system, you can program your computer so that when the battery power falls
below a certain level, three events occur: the alarm goes off, a message is displayed, and the LCD is
turned off.
To enable the battery alarm, do the following:
1. Start the Power Manager program.
2. Click the Global Power Settings tab.
3. For Low battery alarm or Critically low battery alarm, set the percentage of the power level and set
the action.
Note: If your computer enters sleep or hibernation mode when the battery is low, but the alarm message
has not yet been displayed, the message will be displayed when the computer resumes. To resume normal
operation, when the message is displayed, click OK.

Using the ac power adapter

The power to run your computer can come either from the lithium-ion (Li-ion) built-in battery, 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 might 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 the transformer pack.
2. Connect the ac power adapter to the power connector of the computer.
3. Connect the power cord to an electrical outlet.
Tips for using the ac power adapter
• 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, make sure 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. You need to
charge the battery in any of the following situations:
– When the battery icon in the Windows notification area shows a low percentage of battery power
remaining.
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Chapter 2 Using your computer
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