How to stop battery from draining

Question

My 5S had a battery drain problem where it drained in approximately 8 - 10 hours, with minimal use, when I first got it on the day it was first available.
- About a week to 10 days later (after the 5S became available), an update came through and the phone's battery life was then excellent.
** It remained excellent and was outstanding to use - NO PROBLEMS OR CONCERNS AT ALL -- it was a JOY!!
- An update happened about a 4 - 5 weeks ago (January 2014) and it absolutely changed the phone's abilities.
The phone now is acting like it originally did when I received it.
-- It seems that the last update wiped out the correcting update about 7-10 days after initially purchasing it.
If I charge the phone to 100% at midnight, and unplug it from the charger (example), by 7:30 - 8 am the next morning, the phone is totally discharged and can't even start or take a call -- and that is WITH NO USE AT ALL!.
I have been to the Genius bar several times, been on the phone with Apple support several times, restored it several times, etc... etc... etc... had the battery checked and rechecked.....
-- and it still drains pathetically fast.
Are there any fixes that anyone is aware of?
If not, I may need to go back to my 4S and use it.  It was certainly dependable and lasted.
Any possibility that my old 4S would act the same as the 5S, if I began using it again?
The response I received for this 5S, is that thephone will not be replaced (On my last visit to the Genius Bar, after much discussion, Apple Techs had me wait while the battery was replaced)
- To no avail, the battery drains just as quickly- It must be a software problem...
Any ideas on a fix for this?
Thank U

Answer 1

Try turning your "Location Services" and GPS off. A lot of battery drains out because of these two as well, though we do not use these services frequently. If you work on wifi, of course switch off your data services. Bluetooth, if left open, will continously search for near by devices. Hence turn that off too.
Apart from this, you can save a little more on battery by turning your SIRI off.
Another things that can save a good amount fo battery is, turning off your Touch Sensor (finger print technology) Id. That takes quite a battery usage.
Also, even in your camera settings, turn off the setting that asks for "capturing locations and gps details" for every picture clicked. I believe, these should suffice.
Last, but not the least, an important thing. We open multple apps in our phone but forget to close them. Hence if you're using your phone and have multiple apps opened in the background, close them all immediately if you wont be using them often. If the apps remain opened in the background, they would definitely take up memory and battery life for updating the content.