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Power management
This section provides information about how to use ac power and battery power to achieve the best balance
between performance and power management.
Using the ac power adapter
The power to run your computer can come either from the battery or from ac power. While you use ac power,
the battery charges automatically.
Your computer comes with a USB-C type ac power adapter and a power cord.
ac power adapter: Converts ac power for notebook computer use.
Power cord: Connects the ac outlet and the ac power adapter.
Connecting the ac power adapter
To connect the computer to ac power, ensure that you follow the steps in order:
Attention: Using an improper power cord might severely damage your computer.
1. Connect the power cord to the ac power adapter.
2. Connect the ac power adapter to one of the USB-C connectors of the computer.
3. Connect the power cord to an electrical outlet.
Tips on 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.
Using the battery
When you use your computer away from electrical outlets, you depend on battery power to keep your
computer running. Different computer components consume power at different rates. The more you use the
power-intensive components, the faster you consume battery power.
Spend more time unplugged with ThinkPad batteries. Mobility has revolutionized business by enabling you to
take your work wherever you go. With ThinkPad batteries, you are able to work longer without being tied to
an electrical outlet.
Checking the battery status
Move your pointer to the battery-status icon in the Windows notification area to check the battery status. The
battery-status icon displays the percentage of battery power remaining and how long you can use your
computer before you must charge the battery.
The rate at which you use battery power determines how long you can use the battery of your computer
between charges. Because every computer user has individual habits and needs, it is difficult to predict how
long a battery charge lasts. There are two main factors:
How much energy is stored in the battery when you begin to work
The way you use your computer, for example:
How often you access the storage drive
How bright you make the computer display
Chapter 2. Using your computer 27
45


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