Laptop battery suddenly runs out so quickly?

Hey have the problem that my laptop battery drains faster and I only noticed it the other day a week ago. In the past it was 11% for about 1h + about 10-20min video streaming now it is somehow about 22-23% per hour. Suddenly. Otherwise, my laptop is very new. Brightness setting etc have not changed. Do you know why it could be that way?

I guess that your battery is defective. If warranty exists, exchange it, otherwise buy a new battery.

Try changing the energy saving plan. Maybe it will help. If not, I guess a defective battery or battery PCB.