not too long ago, I had charged up my old iPhone 6s plus because I left the phone I currently use in my fiancé's car and I was trying to contact him to tell him. Well I guess after years of sitting in a drawer and then finally being charged and used, it messed with the battery somehow or maybe after sitting for years, something in it corroded? Before I turned it on, it was normal. But after using it again, the battery started to swell. When I noticed I turned the phone all the way off and haven't touched it since. I'm terrified this thing will rupture and start a fire. I also dont wanna lose all my old high school pics I took on this since I don't think I backed them up at all. I'm wondering how much it'll be to replace the battery. And if Apple will even replace it since it's an older model. Or if they'll refuse since the battery is so swollen and it would be a hazard.