How are you getting two days?? Is that light usage? I struggle to get past maybe 7 hours. But I'm using it quite a bit between music streaming, email, text and instant messaging and web browsing.
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First off I will admit that in the time since this post, my battery drain has dropped to about a day and a half, but that's also could be due to the fact I've been on the phone more lately.
I would not say that I am a light user. I am consistently using my device for the same functions that you do, although to a lesser extent during my workday at the office, since mine is a personal device. I can make it go a bit longer given that I use my iPad when at home but not exclusively, since I always have my 5s on me. I am always on the lookout for tips to improve battery life such as these. These are just a few tweeks to your settings.
http://www.payetteforward.com/why-does-my-iphone-battery-die-so-fast-heres-the-real-fix/
I am surprised that you are only getting 7 hrs. Perhaps you are leaving open some battery hogging apps such as Facebook or Twitter? I always shutdown apps that are offending in this area. You could also try the Battery Doctor app, which has helped me.
I'd be curious if any of these tips help. I would be very disappointed with 7 hrs.
Good luck!
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