Chosen Solution
I have an iPhone 5s and its battery drains fast. I charged it to 100 before I went to bed and by the time i woke up it was on the dead battery screen. Its on the newest iOS. What could be wrong with it? Its also on a fresh copy of iOS no 3rd party apps and not being used.
It’s most likely that the battery life has diminished and no longer holds charge properly. They’re easy to replace and don’t cost more than a few $s/£s
