Gaming Laptop Battery Life

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I know this is a 'how long is a piece of string' subject, but I'm hoping for some real-world examples that will help build a picture. What kind of battery life could a well-balanced (i.e. it has a realistic battery capacity) higher Watt version of a 3060 or 3070 gaming laptop achieve for a) gaming and b) desktop stuff?

Are we talking 4 hours of light gaming and 8 hours of desktop? Or is it more like 2 hours of gaming and 6 hours of desktop?

 

[Squink]

EDIT: Looks like performance gaming with these 3000 series laptops an hour of gaming is more likely :s

Yes, I did some research and found that an hour is a possibility. I also didn't know that gaming laptops perform worse on battery than on the mains - I assumed they went at full throttle and the battery just drained faster.