Charge the computer

Use ac power

Power source of the ac power adapter:

Power: 170 W or 230 W
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
Output rating of the ac power adapter: 20 V dc, 8.5 A or 11.5 A

When the battery power is low, charge your battery by connecting your computer to ac power with the supplied power adapter. Your ac power adapter might support 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 its temperature. The recommended temperature range for charging the battery is between 10°C (50°F) and 35°C (95°F).

Note: Some models may not ship with ac adapters and power cords. Use only the certified adapters and power cords provided by Lenovo that comply with the requirements of relevant national standards to charge the product. It is recommended to use the Lenovo qualified adapters. You can refer to https://www.lenovo.com/us/en/compliance/eu-doc.

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.
Lenovo provides you with an estimate of how much battery life you might expect from your computer based on the battery life test under specific benchmark. The actual amount of battery life varies significantly depending on your computer settings, usage, configuration and other factors. To maximize the battery life, you can lower the brightness of the computer display or turn off wireless feature when not in use.
The battery may optimize its full charge capacity based on your usage. After prolonged periods of limited use, full battery capacity may not be available until you discharge to as low as 20% and recharge completely. For more information, refer to the power section of the Vantage app.

Note: The actual charging speed of your computer depends 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.