New Energizer EnergyBook Pro Ultra laptop promises 28 hours of use between charges with unprecedented 192Wh battery capacity inside.

source https://www.techradar.com/pro/this-macbook-pro-esque-laptop-has-the-worlds-largest-battery-and-is-built-by-the-same-company-that-brought-you-the-smartphone-with-the-biggest-battery-ever