Battery drain after update to 10.2

i noticed high battery drain after i have updated to 10.2. i charged phone to 100% yesterday at 16:00 and now 17h later it is 61%. - i wrote 4 sms'es, 1 short phone call, and that's all. i tried restart few times, checked out if network settings are same as before, nothing helps.
battery application is estimating discharging speed at level of 1% every 24 min. before at the same usage it was at least 50 mins. i heard 10.2 has better battery efficiency, but not for me. anyone has similar experiences after update?

Double check that your Network settings are how you want them as after an upgrade they have a habit of changing.
On my Verizon phone it redefaulted to Global which really burned my battery instead of limiting it to LTE/CDMA, once I changed it back battery life was back (or better) than previously.

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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?
Moderator's note: We have provided a subject-related title to help other forum users easily view and respond to this post.
Solved!
Go to Solution.

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.

Battery drain after updating to iOS 5.1.1

After doing the update to iOS 5.1.1 the phone is getting hot "warm" near the processor and the battery drains about 1% per 10 mins in standby and 10X when running an app. Meaning that the phone will run about 6 hours when it used to run for 48 hours on a charge. When putting the phone in airplane mode battery life appears normal. Following others that have reported this issue, I've done a Reset All Settings and two Erase All Content and Settings then restored from back up. Unfortuately what worked for others has not worked for me...
Took the phone to the Apple store and was told by the genius that there are no issues with the update and that location servers were to blame. Explaining over and over and over again that none of those settings have changed and that the only thing that changed was the update I got no answers, just more frustrated.
Currently I have all location services off and wifi off but still have the same problem.
Looking to either find the magical reset sequence that others have has success with or just roll back the update.
Help.

Close all open apps by double-tapping the home button, then swiping up and off the screen with the app window (not the smaller icon).
Reset your device: hold down the home button along with the sleep/wake button until the screen goes black and you see the Apple, then let go. (No data loss)

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I just upgraded to ios 7.0.6
ever since the phones battery has been draining like crazy, its gone bonkers.
If i leave it overnight without on charge plug , at 75% , its switced off by the time im up in the morning.
My location services are off, background app refresh is off, dont have 3G, and still the phone wont go more than 4 hours,
after coming to 15% the phone just switches off abruptly.
Bad apple days !!

Yes , i reset my phone twice , setting > general> reset all settings
and i let the battery drain till the phone got switched off and then i charged my phone overnight.
nothing happened !
dont know how to restore/ restore as new

My iphone 5 battery draining after update ios 7

After i update to iOS 7 my battery is draining to fast than before, even i stopd the motions, and brightness and etc, please help me

did you try this
http://support.apple.com/kb/HT5594

IPhone 4S major battery drain after updating to iOS 7!!

This is such a joke, and I'm so mad about this, my iPhone 4S which is less than a year old use to pull 7-8 hours usage and 12-15hours standby time, now thanks to ios 7 my iphone 4s is currently at 24% with only 2 hours usage and 4 hours and 45minutes standby... 2 hours usage ***? and that's lite usage of just checking emails. I've got most things turned off, siri, location services, blue tooth, notifications, brightness down the lowest and on auto, why is the battery STILLL draining? this phone is basically useless, what's the point apple releasing an update that isnt compatible?? Why have a iphone where I have to turn off all the 'boasting' features???
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No improvements but u can give it a shot

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EtreCheck version: 2.1.8 (121)
Report generated 15 april 2015 22:26:06 CEST
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Hardware Information: ℹ️
    MacBook Pro (15-inch, 2.53GHz, Mid 2009) (Verified)
    MacBook Pro - model: MacBookPro5,4
    1 2.53 GHz Intel Core 2 Duo CPU: 2-core
    4 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1067 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1067 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 405
Video Information: ℹ️
    NVIDIA GeForce 9400M - VRAM: 256 MB
        Color LCD 1440 x 900
System Software: ℹ️
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USB Information: ℹ️
    Apple Inc. Built-in iSight
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Kernel Extensions: ℹ️
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User Login Items: ℹ️
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    Skip System Files: NO
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    Volumes being backed up:
        Macintosh HD: Disk size: 319.21 GB Disk used: 97.34 GB
    Destinations:
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Top Processes by CPU: ℹ️
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Double check that your Network settings are how you want them as after an upgrade they have a habit of changing.
On my Verizon phone it redefaulted to Global which really burned my battery instead of limiting it to LTE/CDMA, once I changed it back battery life was back (or better) than previously.

Battery drain after updating what's happening?

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Im really shocked this forum has so many similar posts and apples doing nothing about it. Why should i have to exchange a 1 month old phone we are spending close to a 1000 dollars for this crap you dont have this bs even in korean or cheap chinese phones. Arent there any consumer rights forums that can sue these guys?

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No but I have resolved it by charging it to 100%, reboot and then sync to Itunes.. It is working fine.. Thanks for help

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