Multimedia laptop that makes big noise while seeing movies? if so, it is a bad joke. Notebookcheck could be more precise concerning when noise occurs: web surfing?, listening to music or viewing a concert, office work, youtube video viewing with high brightness? other social media? movies. All this also taking account the ambient temperatures.
Maybe setup a unique test of representative workflows and uses for batteries runtimes and also have at same time a microphone recording noise it makes while in those battery tests.
The most crucial aspects would be listening to music/viewing a HQ visual and sound spectacle.