Hi All, My 5S is doing pretty well, a little over two years old and functioning as designed with minimal slowdowns. Updating to 9.3 last night gave it a nice bump in speed and smoothness. Battery life isn't great, however. A question for those of you that have replaced batteries on these: Did you see a noticeable improvement? I'm wondering how much of the degradation has to do with aging and how much of it is newer (and more resource intensive) software. I understand that it is a mixture of both to some degree, but if I'm to replace the battery I would like to see a nice jump in longevity. I charge the phone daily, so it has seen two years worth of cycling, FYI. Thanks in advance for your feedback and advice.