Use ac power
Power: 135 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, 6.75 A
When the battery power is low, charge your battery by connecting your computer to ac power with the supplied power adapter. The 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.
Some models may not ship with ac adapters or 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.
For AMD models, it is recommended that you use ac power instead of battery power for better performance.
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.
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.
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 display brightness of the computer display or turn off wireless feature when not in use.