Lenovo ThinkPad 11e - Manual (Page 47)

Power management
The power to run your computer comes either from the ac power provided by the ac power adapter of your
computer, or from the lithium-ion (Li-ion) battery provided with your computer. While you use ac power, the
battery charges automatically.
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.
Using the ac power adapter
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 connects to the ac outlet and to 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 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 transformer pack when the power cord is connected to
the transformer pack.
• If the battery-status icon in the Windows notification area shows that the battery power remaining is low,
you can charge the battery when the ac power adapter is connected to the computer.
Note: Before you charge the battery, make sure that the battery temperature is at least 10°C (50°F).
Checking the battery status
The battery-status icon in the Windows notification area shows the percentage of battery power remaining.
The rate at which you use battery power determines how long you can use the battery of your computer
between charges. Because each computer user has different habits and needs, it is difficult to predict how
long a battery charge will last. 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 hard disk drive or solid-state drive.
– How bright you make the computer display.
– How often you use the wireless features.
To check for detailed battery status information, do the following:
Chapter 2 . Using your computer 31