[pquki4]

Most of the official battery life numbers you see from manufacturers are like 18 hours when the reality is less than 8 hours which is just meaningless. The numbers from reviewers using benchmarks like "modern office" might not be applicable to you, but should be relatively accurate. I would advise checking some reviews and reddit posts to see what people say.

Also note that this heavily depends on the CPU and screen configuration (LED or OLED).

One data point here: My laptop with an AMD 7840U with FHD+ IPS screen could last 9 hours in my own testing, that's without video calls or heavy multitasking. It's a ThinkPad but there are a few on the market with the same APU. A similar test on an Asus laptop with i5-1240p high-res OLED would yield 5 hours using the same method.

I know, it's annoying that there is no easy way to get a somewhat realistic estimate of the battery life on Windows laptops, while official Macbook battery life in the specs is reasonable and often accurate. Generally, you would want to get a low voltage CPU and avoid OLED screens if you want good battery life.