09-25-2014 04:16 PM
49 12
tools
  1. thegooner's Avatar
    I get wildly varying battery performance on my 920.

    At the end of the day yesterday, I turned off all but one background task (Bing Weather), turned off location, NFC, Bluetooth and ensured no apps were running (long press of back button showed the Start screen only).

    Battery life was 48% at 22:30 when I went to sleep, woke up early and checked my phone, at 04:30 it had gone down to 30%.

    As I had difficulty going back to sleep, I looked at a Twitter and read numerous articles on the web referred to in my Twitter timeline.

    At 06:30, after my screen being on for 2 hours of constant browsing, the battery had dropped down to 8%.

    I'm a bit confused that by not using it at all, no apps and only 1 background task it went down 18% in 6 hours, and with 2 hours of constant use it went down 22%.

    I'm on the post-Cyan dev preview, UK country variant ROM.
    09-08-2014 01:05 AM
  2. FranBlagru's Avatar
    What battery app is that?
    Battery performance.
    09-08-2014 07:49 AM
  3. jrdatrackstar1223's Avatar
    I'm considering going from update 1 back down to regular Cyan to see if my battery life will improve. My battery life is a little better with Cyan on top of the dev preview update 1 but it is still terrible compared to the 2nd dev preview update from months ago.
    09-08-2014 08:12 AM
  4. FranBlagru's Avatar
    I'm considering going from update 1 back down to regular Cyan to see if my battery life will improve. My battery life is a little better with Cyan on top of the dev preview update 1 but it is still terrible compared to the 2nd dev preview update from months ago.
    But wouldn't you lose all your stuff? :/
    jrdatrackstar1223 likes this.
    09-08-2014 11:38 AM
  5. jrdatrackstar1223's Avatar
    But wouldn't you lose all your stuff? :/
    I did a backup first. I did lose my start screen (since it was folders), but I'm ok with that. The Wifi here at work is terrible so I have yet to actually see if it's any better.
    09-08-2014 11:59 AM
  6. Jazmac's Avatar
    What battery app is that?
    Its called Battery Performance.
    09-09-2014 08:54 AM
  7. WDavis4692's Avatar
    Just to clarify this post is regarding the 1520, not 920, in response to a previous poster who said his 1520 battery disappoints him.

    My L1520 highly disappoints me. Got it about 3 days ago and fully charged, it records 1day 15hrs.
    The 'estimated time remaining' figure is pretty bull**** anyway. Mine always says 'estimate time remaining 2 days' and 2 days later i'm still above 40% charge. This was yesterday.

    Here's a screenshot from right now:

    wp_ss_20140909_0001.jpg

    11 hours idle and i'm at 87% so that's 1.18% drain/hr while idle.

    Well, it's not completely idle as my alarm went off, then I snoozed it as I couldn't be bothered to get out of bed. I snoozed the alarm two or three more times before I finally woke up.

    100 / 1.18 = 84.74 hours. That's 3 and a half days idle, not even including battery saver kicking in at 20%.

    This is with NFC and motion data off, bluetooth off, but location ON, cortana ON and pinned to start, and about 10-12 background tasks running, including Battery Saver itself, and glance set to peek.

    The conclusion must be that the 'estimated battery life remaining' figure is taking into account your previous usage habits; and your typical battery life from previous charges. I'm beginning to reckon that most people's batteries are fine, they just have a bias and expect too much.
    Last edited by WDavis4692; 09-09-2014 at 10:17 AM.
    aikidaves likes this.
    09-09-2014 10:04 AM
  8. uselessrobot's Avatar
    I think battery life is somewhat better with Cyan, but I'm not positive. At least it hasn't gotten any worse, which is a good thing.

    Windows Phone does still have the glitch where some app will get stuck consuming cycles after it's been closed. For me it happens more with games than anything else but I have even had it happen with the Nokia camera app. It's far more likely to happen with heavier app use, otherwise I can go ages without a problem.

    I'm really curious to know if this is an OS or a hardware issue. I had the problem from the start and it persists to this day. I've never seen anything like this on my iPad or old Android phone.
    09-09-2014 10:18 AM
  9. aikidaves's Avatar
    What WDavis4692 said. The estimate appears to be based on a weighted average of recent usage, biased a bit by a default number that's either hard-coded or calculated in the firmware based on the specific hardware (battery and electronics) of the phone. It's a simple statistical prediction, but it can't know how you're actually going to use the phone in the next hours, so it's really just an educated guess. Most of the third-party battery apps appear to get their estimates from the same API that Battery Saver uses, which is why they're always the same. Don't trust any of them to be terribly accurate unless you're a robot whose phone use routine never varies.
    09-09-2014 10:27 AM
  10. Pastorhss's Avatar
    With 8.0, my discharge rate was never more than 3.5%. I'd mostly get than 24 hrs+ worth. Since the 8.1 and 8.1 Update 1 (both this week), I've barely made it to 5:00pm! Discharge rate is 5-7%, and has been in the double digits.

    I have turned off all but three backgound tasks. Email syncs hrly. Location, cortana, wifi sense is off. Vibration is off. IE is off.

    I've read a lot about the battery, including here. A number of people have said that battery meters actually drain battery (not a problem in 8.0) Others say that after updates, it will take a few days/week for battery to stabilize.

    Can anybody give more suggestions? Should I wait a bit? Can I go back to 8.1 or even 8.0???

    Thanks,
    Reall Upset



    Edit Post Reply Reply With Quote
    09-10-2014 02:35 PM
  11. aikidaves's Avatar
    Pastorhss, you've obviously done a lot of the recommended correction actions, but you haven't mentioned whether you've done any soft resets, battery recalibrations (run battery down until phone shuts off, then charge to 100%), or if you've tried a hard reset. So, have you tried any of these? I can understand a reluctance to do a hard reset, since it wipes the phone. Reinstalling, whether 8.1 or 8.0, will also wipe the phone. I will say that I think part of the lack of problems with my phone is due to directly installing Cyan and 8.1 using NSRT, rather than backing up to Black/8.0 and running an update. I think most of the problems people encounter are due to issues in the update process, not in the actual firmware and OS. That's just my opinion, of course.
    Pastorhss likes this.
    09-10-2014 02:49 PM
  12. Pastorhss's Avatar
    Pastorhss, you've obviously done a lot of the recommended correction actions, but you haven't mentioned whether you've done any soft resets, battery recalibrations (run battery down until phone shuts off, then charge to 100%), or if you've tried a hard reset. So, have you tried any of these? I can understand a reluctance to do a hard reset, since it wipes the phone. Reinstalling, whether 8.1 or 8.0, will also wipe the phone. I will say that I think part of the lack of problems with my phone is due to directly installing Cyan and 8.1 using NSRT, rather than backing up to Black/8.0 and running an update. I think most of the problems people encounter are due to issues in the update process, not in the actual firmware and OS. That's just my opinion, of course.
    Thanks for your kind advise. I really want to get this settled. I use my WP very much, for ministry and personal use. And I love the 8.1 and Update 1 features.

    I've done soft reset. Yesterday, I let it run down/shut off ... then I charged it, but it was only about 96% when I went to bed. I have not done a hard rest. If I do, what version would I have when it resets? (Right now I have 8.1 and 8.1 Update 1) I think that you're saying that I would go back to 8.0 (Black) and then update using NSRT. Correct? How much info/data would I lose? How would I go about the NSRT?

    I feel that I can really trust you. So, I look forward to your response.
    Blessings.
    09-10-2014 03:56 PM
  13. aikidaves's Avatar
    Thanks for your kind advise. I really want to get this settled. I use my WP very much, for ministry and personal use. And I love the 8.1 and Update 1 features.

    I've done soft reset. Yesterday, I let it run down/shut off ... then I charged it, but it was only about 96% when I went to bed. I have not done a hard rest. If I do, what version would I have when it resets? (Right now I have 8.1 and 8.1 Update 1) I think that you're saying that I would go back to 8.0 (Black) and then update using NSRT. Correct? How much info/data would I lose? How would I go about the NSRT?

    I feel that I can really trust you. So, I look forward to your response.
    Blessings.
    You trust me? Oh, my...

    A hard reset doesn't change the software, it just removes all third-party apps and user data, then gives you the option to restore from your backups when you sign back in to your Microsoft account. So, if you have 8.1 Update 1 before, you will still have 8.1 Update 1 after. If your backup is good and you choose to restore, all of your apps will reinstall, your settings will be recovered, and your start screen customizations will likely come back. Any files on your phone - pictures, music, documents, etc. - will be deleted, so you need to make sure you have them backed up to the cloud (OneDrive or what have you) or a PC so you can get them back. Any user data in apps that don't back it up will also be lost, which means things like game scores and ranks will vanish. Unfortunately, most of those can't be recovered.

    The Nokia Software Recovery Tool is an application that you download and install on a PC. It wipes your phone just like a hard reset, but it also replaces the firmware and software on your phone with the 'current production version' for your specific model and variant, per Microsoft Mobile's records. This may be Black firmware and WP 8.0, or it may have recently been updated to Cyan firmware and WP 8.1 (saves a lot of work if it's this one). When it's done, you may still have to run update to bring the phone to the most current version released for your variant, and then you'll have to install and enable the Preview for Developers app if you want to bring it up to DP Update 1 again. You can then hard reset and restore to get back as much of what you have now as you can, same deal as with the hard reset above.

    Before you do either of these, make sure your backups are good. Go into Settings, backup, and manually run the apps+settings backup, then check to be sure you have backup turned on for text messages. Lastly, make sure you have all your files copied off to the cloud or a PC.

    Please ask if you have any more questions or if any of this isn't clear. Good luck!
    09-10-2014 04:19 PM
  14. Pastorhss's Avatar
    You trust me? Oh, my...

    A hard reset doesn't change the software, it just removes all third-party apps and user data, then gives you the option to restore from your backups when you sign back in to your Microsoft account. So, if you have 8.1 Update 1 before, you will still have 8.1 Update 1 after. If your backup is good and you choose to restore, all of your apps will reinstall, your settings will be recovered, and your start screen customizations will likely come back. Any files on your phone - pictures, music, documents, etc. - will be deleted, so you need to make sure you have them backed up to the cloud (OneDrive or what have you) or a PC so you can get them back. Any user data in apps that don't back it up will also be lost, which means things like game scores and ranks will vanish. Unfortunately, most of those can't be recovered.

    The Nokia Software Recovery Tool is an application that you download and install on a PC. It wipes your phone just like a hard reset, but it also replaces the firmware and software on your phone with the 'current production version' for your specific model and variant, per Microsoft Mobile's records. This may be Black firmware and WP 8.0, or it may have recently been updated to Cyan firmware and WP 8.1 (saves a lot of work if it's this one). When it's done, you may still have to run update to bring the phone to the most current version released for your variant, and then you'll have to install and enable the Preview for Developers app if you want to bring it up to DP Update 1 again. You can then hard reset and restore to get back as much of what you have now as you can, same deal as with the hard reset above.

    Before you do either of these, make sure your backups are good. Go into Settings, backup, and manually run the apps+settings backup, then check to be sure you have backup turned on for text messages. Lastly, make sure you have all your files copied off to the cloud or a PC.

    Please ask if you have any more questions or if any of this isn't clear. Good luck!
    Ok. So I'll download the NSRT. Then I may wait a few days to see if things stablize. Or maybe not. Be on the lookout. Either way, I'll let you know.

    Thanks.
    09-10-2014 04:29 PM
  15. fdruid's Avatar
    I'm getting better battery life with cyan too, even though I also added dev preview update 1, since I wanted Live Folders.
    So you can install Cyan then DP to Update 1?
    09-21-2014 09:15 PM
  16. Visa Declined's Avatar
    God, I really need to get a new battery in my 920, it's plum wore out. I'm not even the original owner of it, and who knows what the previous owner did to it.
    09-21-2014 09:52 PM
  17. Davey123's Avatar
    Was same before I installed the battery app. I also have same philosophy as you regarding battery apps. I used only the stock app but later got this too better monitor my battery and see how I can Improve its life.
    ​It is Battery Performance.
    iluvtilz likes this.
    09-21-2014 10:26 PM
  18. Wagan8r's Avatar
    I seem to actually have worse battery life with 8.1 Update 1. I hardly use my phone while at work, and it's usually at about 20-30% by the time I head home.
    09-22-2014 05:14 PM
  19. Lev VioN's Avatar
    The estimated time remaining is always wrong. It can last longer than that ! Look at some of my battery stats.

    wp_ss_20140519_0001.png
    wp_ss_20140520_0001.png
    wp_ss_20140521_0001.png
    wp_ss_20140522_0001.png
    wp_ss_20140522_0002.png
    09-25-2014 01:08 PM
  20. HyperKid's Avatar
    the estimated time remaining is always wrong. It can last longer than that ! Look at some of my battery stats.

    Click image for larger version. 

Name:	wp_ss_20140519_0001.png 
Views:	13 
Size:	130.7 KB 
ID:	82376
    Click image for larger version. 

Name:	wp_ss_20140520_0001.png 
Views:	13 
Size:	130.0 KB 
ID:	82377
    Click image for larger version. 

Name:	wp_ss_20140521_0001.png 
Views:	12 
Size:	128.8 KB 
ID:	82378
    Click image for larger version. 

Name:	wp_ss_20140522_0001.png 
Views:	12 
Size:	134.2 KB 
ID:	82379
    Click image for larger version. 

Name:	wp_ss_20140522_0002.png 
Views:	12 
Size:	130.0 KB 
ID:	82380
    wow
    09-25-2014 01:23 PM
  21. Davey123's Avatar
    I may have possibly discovered why my battery is draining so quickly. I noticed that one of my email accounts is stuck in a continuous sync mode. And, because it is in this mode, I cannot change the settings or delete the account. I am not certain if this is the culprit of my battery drain problem. However, I did stop receiving emails from this account at about the time my phone battery started draining very quickly. Does anyone know how I can stop this email account from continuously syncing?
    09-25-2014 03:06 PM
  22. Narada93's Avatar
    Try deleting the email account and adding it again
    Davey123 likes this.
    09-25-2014 03:11 PM
  23. Davey123's Avatar
    Because it was continuously syncing, the email account was "grayed out". Thus, it wasn't allowing me to delete it. I checked the internet about this problem and Nokia suggested turning the phone off and then holding down the power button for 10 seconds. Once the phone came back on, the email account was no longer gray. Thus, I deleted it. I will see if this is the culprit for my battery drain and overheating.
    09-25-2014 03:39 PM
  24. metalchick719's Avatar
    Hmm, funny, I've had excellent battery life with my 920 before and after the Cyan update. Last week, I used that phone pretty much exclusively because I needed the extra storage for taking pics at the Renaissance Faire my boyfriend and I went to. My phone often got 30+ hours of battery life though, even before Cyan. There was no service at all at the Faire, so I put my phone on Airplane mode while I was there. It was still at 100% when I did that in the morning and then went to 80% by the time we left after 6:30 that evening. I did notice that the battery started draining pretty fast later, though, after I put on LTE, but I think that was because we occasionally hit dead zones on the trip back home and the phone was struggling to keep a signal.
    09-25-2014 04:16 PM
49 12

Similar Threads

  1. After update extra+info app won't open?
    By Rakesh Racky in forum Update 1 for Windows Phone 8.1 (GDR1)
    Replies: 5
    Last Post: 09-09-2014, 08:55 AM
  2. Replies: 4
    Last Post: 09-08-2014, 06:04 AM
  3. AT&T locker to computer
    By WPCentral Question in forum Ask a Question
    Replies: 1
    Last Post: 09-05-2014, 09:03 PM
  4. nokia lumia 625 window phone 8.1
    By Panther Seyha in forum Ask a Question
    Replies: 0
    Last Post: 09-05-2014, 07:36 PM
LINK TO POST COPIED TO CLIPBOARD