Best settings for battery life? G16 2024

I recently saw a review on Youtube of a G16 with a 4090 discharging at 8W when doing basic stuff, such as browsing. I bought the G16, i9, RTX 4060 version, and I'm dischargin at 16W, which is the exact double (without anything running on the background). Is it because of the third fan maybe? It might be something else that I'm missing.

I'm using silent and eco mode, and I'm nowhere near getting the 8 hours of use that I've seen in some comments. Also, in the review I mentioned at the start the CPU was running at 40 degrees, whereas mine is at 55 degrees approximately. Any explanation for this?

Link to the review: 2024 Zephyrus G16 - The Ultrabook of Gaming Laptops (In-Depth Review and Guide) (youtube.com)