Asus ZenBooks and VivoBooks have 75Wh batteries on 14" models and 96Wh on 16", with the exact same Samsung OLED Gen 3 panel. These are also Ryzen CPU models which makes them last far longer than any Thinkpad. My personal Asus OLED laptop lasts about 9 hours browsing at 60Hz.
Lenovo has one too - Yoga 7 14 AMD (2022) model with 71Wh Battery / U-CPU / OLED Display. That one gets 8 hours easy.
Thinkpads can't achieve this because they cheaped out on components that contribute to battery life. Plain and simple.
We have now reviewed several configurations of Lenovo's ThinkPad X1 Carbon G10, and an OLED model recently passed through our test labs. Image quality certaintly counts among its advantages, but buyers are forced to sacrifice battery life in return.