Why is the battery only lasting 1 hour and a half?!

LOQ 17IRX10

Got a Lenovo LOQ 17IRX10 a couple of months ago after my old computer died. I am not a gamer whatsoever but I needed the ability to open some programs that ask for a graphic components. The computer is new, why is the battery only lasting 1 hour and a half?!? I have the low battery mode on, all the vantage recommended settings ecc, I am currently only studying in it, where does all the goddamn charge go? I need this computer to work when I don’t have an outlet available 😭 is it normal?!