Battery Drain Iphone 6 after Upgrade to IOS 8.3

Hi,
After upgrading my IPhone 6 from IOS 8.2 to IOS 8.3 couple 2 days ago, I'm keeping the IPhone on power adapter, unbelievable battery drain.
I did everything I can to prevent running out of battery:
- Brightness
- Background applications
- Reset all settings
- Select the carrier manually, by the way I have a 4S still on 8.1 the Carrier is showing full bar and the IPhone 6 is showing 2 bars out of 5 only.
- I restored the IOS 8.3 from ITunes again
- The funniest thing that I’ve set it to airplane mode but the same, what it means that the carrier and wireless are not consuming the battery life only it is something related to IOS 8.3
I check the applications consuming the battery, the surprise was when not using the iPhone it is showing the “Home Lock Screen”.
Any Idea if there is a fix for this issue, or any news about a new IOS fix that will be released soon?
Or should I be connected always to the power adapter?
Regards.

Yes, I have the same problem. Before upgrading to 8.3, my iPhone 6 battery can last 2 days. However, with 8.3, I have to charge my phone every 12 hours. It seems the problem is from the background applications, cause the battery keeps dropping quickly even if I don't use the phone. I have turned the background applications refreshing off to see if it would fix it temporarily.

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