That seems quite top of the line even today.
For battery life, the screen, the screen, the GPU (seems you use an IGP), the size of the screen, and the CPU are the main culprits.
64GB RAM will use some battery do you really need that much?
Hopefully your 1TB is an SSD otherwise an SSD is a nice upgrade.
There are also fat fat powerbanks for power users far away from a 110/220volt line!
I Am curious, most often power hungry laptops are gaming ones… What do you do with yours?
Interesting, thanks for sharing!