Chosen Solution
i have an iphone 6s plus that dies when it’s at 100% and dies within minutes of using it but this only happens when it’s to cold. and it also dies whenever you don’t you use it. it could be at 100%and within 2 hours it will be at 1%. why might this be?, i have an idea it might be the battery but i’m not sure.
Battery is on it’s way out. Better to get it replaced sooner or later. You can get it replaced at a reputable local phone repair shop or you can replace it yourself with the links below for guide and where to buy: iPhone 6s Plus Repair iPhone 6s Plus Battery Replacement
