IPhone 5 s, software iOS 7.1.1 BATTERY POWER

Since updating my phone just a few days ago, my battery power has been dropping dramatically. I've been to two apple stores in Sydney to try to rectify this, yet been unsuccessful. My battery is dropping 10% every hour on standby.
We have turned off location services, background apps refresh, wifi, cellular data, everything that would suck up the battery power.
I didn't have this issue with the iPhone 4, and now I'm really cheesed off.
Highly considering using a home phone landline attached to nothing will be more useful than the iPhone 5s, iOS 7.1.1
Am I suppose to carry a power cable and spare back up battery devices everywhere I go?

welcome to the club
a solution of the problem does not exist unfortunately. all tips expressed here do not or only partially work.

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