I just tried to clean the inside of my macbook pro (15', late 2013) today since the fan noise is insane. Then when I removed the back lid, I found that the battery module is swollen. please see the picture. This scared me. Because recently I heard a lot about batteries, samsung cellphone, dell laptop, but I didnt expect that my mac is also facing issues with batteries. Since I bought i in 2014, the warranty is long gone, and replacing the battery seems cost a lot, what should I do? should I remove the battery immediately then use it like a desktop?