Charge the computer

Use ac power

Power source of the ac power adapter:

Power: 45 W or 65 W (depending on the model)
Sine-wave input at 50 Hz to 60 Hz
Input rating of the ac power adapter: 100 V to 240 V ac, 50 Hz to 60 Hz

When the battery power is low, charge your battery by connecting your computer to ac power. The 65 W ac power adapter 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.

Note: To maximize the life of the battery，use the battery until the charge is depleted and recharge the battery completely before using it. Once the battery is fully charged, it must discharge to 94% or lower before it will be allowed to recharge again.

Use P-to-P 2.0 charging function

The USB-C connector (USB 3.2 Gen1) on the computer features 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.

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

To use the function, ensure that 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. Connect the computers to each other with a USB-C to USB-C cable. In this situation, computer A works as the power supply. Once the remaining battery power of computer A is lower than 30%, computer A stops supplying power to computer B.

Note: The actual charging speed using the Lenovo-unique P-to-P 2.0 charging function varies depending on many factors, such as the remaining battery power of the computers, the wattage of the ac power adapter, and whether you are using the computers.