The Lenovo Power Manager is a software utility designed to manage power settings and optimize battery performance on Lenovo laptops and desktops. It helps users control their laptop's battery charging behavior, monitor battery health, and configure power profiles for different scenarios, such as extended battery life or maximum performance. It may also provide advanced features like the ability to control the battery charge threshold to prevent overcharging, which is particularly useful for users who mainly use their laptop while plugged in.