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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.
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: an alarm is initiated, a message is displayed, and the LCD turns off.
To enable the battery alarm, do the following:
1. Start the Power Manager program and then click the Global Power Settings tab. For instructions on
how to start the Power Manager program, see “Accessing Lenovo programs” on page 13.
2. In the Alarms area, set the power level percentage and the action in the Low battery alarm section and
Critically low battery alarm section.
Note: If your computer enters sleep or hibernation mode when the battery power is low, but the alarm
message has not yet been displayed, the message will be displayed when the computer resumes. To return
to normal operation, when the message is displayed, click
OK .
Charging the battery
It is recommended that you charge the battery when the battery power remaining is low. For example:
• When you find that the percentage of the remaining power is low.
• When the power alarm alerts you.
If an ac outlet is convenient, connect the ac power adapter to the computer and the ac outlet. Depending on
the battery size and the physical environment, the battery will be fully charged in about three to six hours.
The battery-status icon helps you identify that the battery is charging, and that the battery is fully charged.
Note: To maximize the life of the battery, the computer does not start recharging the battery if the remaining
power is greater than 95%.
Managing the battery power
To achieve the best balance between performance and power saving, adjust your power plan settings
by doing the following:
1. Go to Control Panel, then change the view of Control Panel from Category to Large icons or Small icons.
2. Click Power Options .
3. Follow the instructions on the screen.
Power-saving modes
There are several power-saving modes that you can use at any time to conserve power. This section
introduces each mode and gives tips on the effective use of the battery power.
• Screen-blank mode (for Windows 7 only)
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User Guide