Is it normal that browsing Facebook and YouTube on Safari alone drains so much battery? It goes from 100% to 80% in about 2h-2.5h and when I click on the batery icon a message is displayed saying that Safari is consuming too much battery/energy. Or is it because I have brightness set to 100%? 13-inch MacBook Pro 2018 purchased about a month ago, about 40 cycles completed.