Heavy Battery Drain after updating to 8.1 Lumia Cy...

After updating my Lumia 1520 to 8.1 Cyan update, the battery drain is very high. The battery is lasting only for 6 to 7 hours when the data traffic is on (under mixed use of 2G and 3G modes). I have noticed few other users were also experiencing heavy battery drain after the Cyan update.
Will there be an update to fix this battery drain issue?
When the phone was in WP 8 Lumia Black update, battery backup was around 24-30 hrs (when data traffic was on).
What will be the workaround for this?
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Yep, my 1520 battery drains like a helicopter that's lost it's rotor after this 8.1 update.
I was just boasting last weekend how awesome the battery life was on this phone, I drove 300mi with the GPS w/navigation, did some tethering to my laptop for work, went overnight..no charging, used lightly all the next day, few pictures, email, browsing, phone calls, and drove 300mi back on GPS/navigation and I still had 38% battery left.
I updated to 8.1 sunday night, and on my normal commute to a customer in another state, which under 8.0 would have drained oh...mabey 4-5%, I was at 62% by the time I got to this customer yesteday.
All I did was make a phone call, that's it. All background stuff is not allowed. location off, cortana off, ...still drains.
Bad bad bad news. I'm not seeing much usefull ness out of 8.1, and considering the battery life and no real new features....just gimmicks if you ask me, I'm not sure I want to stay at 8.1 . I'm trying to give it a chance...battery life is still better than my POS samsung androids I've had in the past, but knowing how good it really can be...and no real features in 8.1 (I was hopeing they'd fix the imap email not allowed to map sent/trash/inbox issue)....eshh...what a mess it seems.

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How Formal Support Works
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Hopefully, this information will be of use to you.
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Report generated 15 april 2015 22:26:06 CEST
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        BANK 1/DIMM0
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    NVIDIA GeForce 9400M - VRAM: 256 MB
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        EFI (disk0s1) <not mounted> : 210 MB
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I wouldn't restore at this point.
I would do this: re-calibrate the battery.
Let the battery drain until the phone is completely dead. (the iPhone powers-itself off!)
plug it in and allow it to charge to 100% [do NOT use it, do NOT unplug it]
This will re-calibrate the charging circuitry with what is reported. It's often likely that the battery report is a false one.
At 100% charge, use the phone normally and watch the performance of the battery.
-Alan

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