Maximizing The Battery Life; Managing The Power Plans; Power-Saving Modes - Lenovo ThinkPad T540p User Manual

If an ac outlet is convenient, plug the ac power adapter into it, and then connect the ac power adapter to
the computer. The battery will be fully charged in about three to six hours. This is affected by the battery
size and the physical environment. You can check the battery charging status at any time through the
battery status icon in the Windows notification area.
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 maximize the life of the battery, do the following:
• Use the battery until the charge is completely depleted.
• Recharge the battery completely before using it. You can see whether the battery is fully charged from the
battery status icon in the Windows notification area.
• Always use power management features such as power-saving modes.

Managing the power plans

To achieve the best balance between performance and power saving, adjust your power plan settings.
To access power plan settings, do the following:
1. For Windows 7: Start the Power Manager program and then click Power Plan or Advanced ➙ Power
Plan. For instructions on how to start the Power Manager program, see "Accessing Lenovo programs on
the Windows 7 operating system" on page 14.
2. For Windows 8: Right-click the battery status icon from the Windows notification area and click Power
Options, click Change plan settings that is next to your power plan.
For more information about the Power Manager program, refer to the help information system.

Power-saving modes

There are several modes that you can use at any time to conserve power. This section introduces each
mode and gives tips on the effective use of battery power.
• Screen blank mode (for Windows 7 only)
The computer display requires considerable battery power. To turn off the power to the display and
make the computer enter screen blank mode, right-click the battery gauge icon from the Windows
notification area and select Power off display.
• Sleep mode
In sleep mode, your work is saved to memory, and then the solid-state drive or the hard disk drive and the
computer display are turned off. When your computer wakes up, your work is restored within seconds.
Depending on the model, your computer might support the 30 Day Standby function. When this function
is enabled, the computer consumes even less power in sleep mode and takes only seconds to resume
normal operation when you press the power button. For more information about the 30 Day Standby
function, do the following:
– For Windows 7: Refer to the help information system of the Power Manager program. For instructions
on how to start the Power Manager program, see "Accessing Lenovo programs on the Windows 7
operating system" on page 14.
– For Windows 8: Open the Lenovo Settings program and click Power ➙ 30 Day Standby.
To put your computer into sleep mode, do the following:
– For Windows 7: Use the Start menu shutdown option.
26
User Guide