I have this laptop but with the 135U. There is NO WAY the battery lasts 12 hours, I can barely get 5 when doing normal microsoft office (word) and microsoft edge browing.
Lenovo has changed the naming scheme. The company's convertible laptops are now supposed to have "2-in-1" in their names, meaning the ThinkPad X13 Yoga Gen 4's successor is called ThinkPad X13 2-in-1 Gen 5. The system is based on the Intel Core Ultra 7 165U; this review explores if that's the right choice and what else has changed apart from the naming structure.