I have a 2 year old iPhone 5s that up until recently never gave me any trouble.
In the past I've always been able to go 2 or 3 days before needing to recharge the battery. About a week ago it started getting power hungry to the point that I now have to recharge it every night.
I've checked the settings and they all appear to be unchanged from where they were before.
I usually close all running apps when I am done using the phone for a while, so I don't think it's apps in the background consuming power.
In case it matters, I'm running iOS 8.4.1.
Could my battery be dieing?