Chosen Solution

I have brought a new battery from iFixit. the battery power drops 1% every 1.5 minutes while only using Youtube. any suggestion how to fix it? Update (06/05/2021) I had my MacBook running Youtube music on for an hour. It used around 25.3 % of power. Meaning that with a new battery (brought from iFixIt), my MacBook can only run for less then 4 hrs without doing anything. @10:11 PM

@11:11 PM

I don’t see any problems. For a 2013 device, the YouTube now seems need too much computing power. Unless you can find an identical device works longer, you can’t prove there is anything wrong.