Charging The Batteries; Maximizing The Battery Life; Managing The Battery Power; Power-Saving Modes - Lenovo ThinkPad T440s User Manual

– When the battery icon in the Windows notification area shows a low percentage of battery power
remaining.
– When the batteries have not been used for a long time

Charging the batteries

When you check battery status and find that the percentage of power remaining is low or when the power
alarm alerts you that the remaining power is low, you need to charge your batteries.
If an ac outlet is convenient, plug the ac power adapter into the outlet, and then plug it into ac power
connector of the computer. The batteries will be fully charged in about three to six hours. The charging time
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 batteries, the computer does not start recharging the batteries if the
remaining power is greater than 95%.

Maximizing the battery life

To maximize the life of the battery, do the following:
• Use the batteries until the charge is completely depleted.
• Recharge the batteries completely before using it. You can see whether the batteries are fully charged
from the battery-status icon in the Windows notification area.
• Always use power-saving modes, such as sleep mode, and hibernation mode.

Managing the battery power

To achieve the best balance between performance and power saving, adjust your power plan settings.
To access power plan settings, do the following:
• For Windows 7: Start the Power Manager program and then click the Power Plan tab. 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 and Windows 8.1: Go to the desktop and right-click the battery-status icon in the windows
notification area and click Power Options. Then click Change plan settings next to your power plan.
For more information, refer to the help information system of the program.

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 in 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:
32
User Guide