Gonna upgrade to iPhone 6 tmrw. The 2 biggest reason is because I want a bigger screen size and better battery life. For those who have upgraded from 5s to 6, how was the battery life? A lot better than 5s? Thanks!
I realize you are trying to compare the 5S to the 6...but I had an iPhone 5 prior to coming the the 6. I had a new battery installed in my iP5 back in March or so and I was happy with the battery life. Since switching to the iP6 I am very happy with the iP6 battery life. It seems to be very stable and consistently has power left even when it is off the charger for 18 hours or more. Very dependable...
The battery life on the 6 is pretty good. It will last me throughout the day with heavy use. It is much better than the 5/5s in my opinion. I will still be getting a Mophie case once it comes out though.