Well... firstly traditionally gaming laptops are never meant to have long battery life. They are engineered for speed and power.
thin&light laptops are designed and engineered differently for power efficiency and battery endurance.
So far Lenovo Legion 5 and Lenovo Ideapad gaming are the only two laptops in the market right now which can claim to be “Thin & light” gaming laptops.
Like i mentioned video conferencing is rather taxing on a laptop, any laptop actually. my thinkpad T495s can only last a max of 1.5hrs of Zoom (max brightness)
In fact it just happened yesterday. I unplugged my t495s (100% battery) go to another quieter room to do my zoom call. I totally forgotten to close other active apps running in thr background and my screen was at max brightness. Around 1.5hrs into the zoom meeting, a low batt warning popped up ar 10%. I had to rush to get my charger
But If i dont do video conferencing with my Thinkpad T495s, and just use it for emails, word processing etc, and set max brightness... nowadays it can last like 7hours.
Instead of 9hrs 1 year ago.
As for the Legion 5 AMD laptop, office use emails, word processing can give around 8hours for the 80whr version, on Quiet mode. mine is the 60whr version and it is able to last me a good 6hrs
But when it comes to video conferencing, the battery will take a big hit
i may wanna suggest to switch to Quiet mode if you are using your Legion 5 laptop for work emails and video conferencing, so that the system will keep it at low power consumption