Lenovo promises up to 15 hours of battery life on a charge for the ThinkPad X1 Yoga, though that's presumably for the FHD model -- the higher-res models will likely drain the battery more quickly.

The lineup includes the Yoga Slim 7i Aura Edition ... Up to 1TB PCIe Gen4 SSD -Intel Arc Graphics -All-day battery life as claimed by Lenovo Lenovo ThinkPad X1 Carbon Aura Edition: Designed ...