Battery drain faster after udating to iOS 8.1.2 ( iPhone 5s A1530 16GB )

I have been wondering faster battery drain after updating to ios 8, I upgraded to iOS 8.1.2 it has been worst with this drain faster by 40% in draining, What shall i do??? I have contacted apple support and customer care i didn't get a solution. Please help??

Hi Jaberboss
I did start a similar thread on this issue myself, but seeing what I've read here I hope you're ok with me adding it here to
This one is a true case of a phone with zero potentail (electrically)
OK, I've done the rounds on this one, whereby I'm just adding to the list of complaints so that (hopefully) the powers that be, or not, in my phones case, might listen.
Since updating my just over 12 month old 5s to 8.1.2, it has turned into a bag of spanners in respect of its battery life. Its literally gone from 24 or so hours between charges to less than 8 !!
I have tried shutting all the apps down and even had it sitting in full airplane mode, where i've left it alone with the screen off, yet its dropping around 1% every 3 to 4 minutes, blinding!! Checked battery usage in settings after 30 minutes, guess what standby 29 minutes usage 1 minute.
Also tried the full restore, but to no avail, still a bag of spanners!
(slight update here)  Even took the SIM out with it in airplane mode and deleted all apps and a full reboot - same thing!
Does anyone remember the good old days of a fixed land line, where the phone had to be plugged into the wall before you could actually use it? lol
Nothing like a bit of retro ay, but some how I cant see this one catching on Mr Apple. Thanks

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