User Manual

Chapter 3. Explore your computer

Manage power

Use the information in this section to achieve the best balance between performance and power efficiency.

Check the battery status

The battery status icon or is in the Windows notification area. You can check the battery status, view

the current power plan, and access battery settings quickly.

Click the battery status icon to display the percentage of battery power remaining and change the power

mode. A warning message is displayed when the battery is low.

Charge the computer

Use ac power

When the battery power is low, charge your battery by connecting your computer to ac power.

The battery is fully charged in about four to eight hours. If the power adapter shipped with your computer

supports the rapid charge function, the battery is 80% charged in about one hour when the computer is

turned off. The actual charging time depends on the battery size, the physical environment, and whether you

are using the computer.

Battery charging is also affected by the battery temperature. The recommended battery temperature range

for charging the battery is between 10°C (50°F) and 35°C (95°F).

Note: To maximize the life of the battery, the computer does not recharge the battery if the remaining power

is greater than 95%.

Use P-to-P 2.0 charging function

Both the USB-C connector (USB 3.1 Gen 1) and the Thunderbolt 3 connector (USB-C) on the computer

feature the Lenovo-unique P-to-P 2.0 charging function. When no ac power is available, this feature enables

one computer to supply power to another computer through a USB-C to USB-C cable. When ac power is

available for only one computer, this feature enables both computers to get charged by ac power.

Before using the function, ensure that:

• The selected connectors support the P-to-P 2.0 charging function and power delivery function.

• Always On USB and Charge in Battery Mode are enabled in UEFI BIOS of both computers, so that the

function works even when the computers are off or in hibernation mode. To enable Always On USB and

Charge in Battery Mode:

1. Enter the UEFI BIOS menu. See “Enter the UEFI BIOS menu” on page 45.

2. Click Config ➙ USB to enable Always On USB and Charge in Battery Mode.

To use the function:

• When no ac power is available:

The remaining battery power of computer A should be at least 30% and be 3% higher than that of

computer B. To check the battery status, see “Check the battery status” on page 27. Connect the

computers to each other with a USB-C to USB-C cable. In this situation, computer A works as the power