02-28-2016 12:43 PM
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  1. Jazmac's Avatar
    I have been reflecting this problem to microsoft for quite a long period of time that, the battery level of my 1520 will drop suddenly from a high level, say 90%, to a critical level that the phone shuts itself down when I was doing some light work on the phone like typing documents or browsing on wifi.
    The problem has been strange because if I charge the battery immediately after it shuts itself down, it can charge up to a point that it will become fully charged suddenly. However, if I leave it for roughly an hour or so, its battery capacity returned to 80-90% without charging. Therefore, I think it is less likely to be a hardware problem but rather a software one.
    I have been reporting this to them when I get I new cumulative update for 10586 and it seems that the problem is still not fixed with the latest 10586.107.
    I would like to ask if anyone had experienced similar situation? I can hardly use the phone on a day to day basis without a power bank.
    Been there, done that. You have a bad battery. Just replace it and you're gold again. Cost less than 20 bucks. I replaced the one in my 1520 and I can get 2 days and some change per charge light to medium use. 3 days with light use meaning just phone, texting and some web. Don't know what to tell you about other phones but this is what resolved my issue.
    Madam ImAdam likes this.
    02-15-2016 01:59 AM
  2. bburgarelli's Avatar
    I can confirm the same behaviour on the L1320. Battery drops to critical suddenly and the phone turns off a little after.

    It's not the battery. Roll back to 8.1 and everything is normal. I had this issue with .29, it was "solved" on .36, returned on .63 and still present on .107.
    If you wait a few minutes before turning the phone back on, you can use it for hours at 0% battery level.
    02-15-2016 04:55 AM
  3. Spindlebox's Avatar
    I experienced a catastrophic failure of the battery on my L1520 yesterday evening, running 10586.107. The battery which is barely 6 months old, the original having been replaced after I suspect Denim wrecked it, showed over 50% remaining in the evening and simply refused to charge when I plugged it in. Thinking it was a fault which required a soft reset, I did one and the phone wouldn't come back on. In panic I tried hard resetting, nothing. I tried leaving it charged for an hour or so, nothing. Finally I decided to use the Windows Recovery Tool and the phone came back on. Having going through the process of flashing the phone and re-installing Windows Mobile 8 (or 8.1), the phone did not go to the "set-up" screen, as it should do. I was left staring at a black blank screen. I re-run the process a couple of times, same. Now seriously suspecting the battery, I decided to replace it with my old original battery, which the Nokia shop gave me when they replaced it, and which I had thoughtfully decided to keep. Guess what? The phone came on and I went through the set-up sequence, right through to the 10586.107 update. I then did a hard reset and set up my phone from scratch (no restore). I left my phone on charge all night (due to the faulty original battery).

    While I was restoring my phone, I decided to put my "dead" battery in a ziplock bag and put it in the freezer. This morning, satisfied with the recovery on my phone, I took the phone off charge and within 15 mins, it died - the old battery's problem struck again! So with very little choice, I took the "dead" battery out of the freezer, waited an hour, and then popped it back into my L1520. Guess what? It's still DEAD! Even when on a charger.

    Without knowing for certain whether or not 10586.107, in itself, killed my battery, the only thing to do now is to replace my battery once more, and see what happens. Since I cannot vouch for the Denim update (after what happened to my original battery), using 10586.107 does not seem a risky proposal, battery-wise. The funny thing is, I have been on .107 for a few days now and things have been generally okay, except for the People app which has been misbehaving since .71, and the battery seemed to be showing signs of durability, so for this to happen, I just hope it is because I failed to do a hard reset after installing .107. I thought we were pass all that "hard reset" nonsense by now!

    There we go folks, my story. I cannot say I am bitter because after all, I am messing around with preview software and these things, while painful, we cannot say we weren't warned! I don't imagine a test-pilot of an experimental aircraft believes he has a 100% chance of returning to terra ferma when he climbs into the cockpit.
    Lesegos likes this.
    02-15-2016 07:17 AM
  4. Lesegos's Avatar
    Voice of a true insider. We all read the fine print and patience is needed.
    02-15-2016 07:46 AM
  5. Brett Sites's Avatar
    I have had the same issue with all of the Windows 10 iterations. When on Windows 8.1, the phone works phenomenally well and I don't have any battery issues. On Windows 10, I could be simply trying to do a check-in with the Facebook app and have 49% battery when the phone shuts down. (Mine doesn't do the loud pop thing. It simply shuts down.) When I turn the phone back on, the battery level is significantly lower. I carry a portable charger with me because I like the features of Windows 10, but I do occasionally roll it back to 8.1 if I have a busy weekend ahead and need the battery life without interruption when taking photos.
    02-15-2016 08:07 AM
  6. terence chan's Avatar
    I have had the same issue with all of the Windows 10 iterations. When on Windows 8.1, the phone works phenomenally well and I don't have any battery issues. On Windows 10, I could be simply trying to do a check-in with the Facebook app and have 49% battery when the phone shuts down. (Mine doesn't do the loud pop thing. It simply shuts down.) When I turn the phone back on, the battery level is significantly lower. I carry a portable charger with me because I like the features of Windows 10, but I do occasionally roll it back to 8.1 if I have a busy weekend ahead and need the battery life without interruption when taking photos.
    I guess we need to wait for an official firmware for the 1520 on w10m then.
    02-15-2016 08:11 AM
  7. Phillip Tshabalala1's Avatar
    My wife's Lumia 1520 and my 640 Dual SIM LTE don't charge at all with the standard 1A chargers after updating to 10586.71. They both only charge with my tablets 2,5A charger. It's a nightmare currently as I travel often and can't recharge on the road. I'm obviously worried about the damage to battery too. Urgent patch needed
    Last edited by Phillip Tshabalala1; 02-15-2016 at 08:43 AM. Reason: left out software version
    02-15-2016 08:41 AM
  8. terence chan's Avatar
    My wife's Lumia 1520 and my 640 Dual SIM LTE don't charge at all with the standard 1A chargers after updating to 10586.71. They both only charge with my tablets 2,5A charger. It's a nightmare currently as I travel often and can't recharge on the road. I'm obviously worried about the damage to battery too. Urgent patch needed
    More and more problems surfaced 😑
    02-15-2016 10:50 AM
  9. phxchristian's Avatar
    It looked about the same as the existing battery, the only difference is that the screen printed text on the battery wasn't as sharp as the old one. It discharges at about the same rate as the old one prior to the update (on 10586.107, which is the build I'm on with the new battery). It gets me through a couple days even at 83% (100%) max charge. It seems like it was the battery to me, but who knows, it may just be that the phone was old enough that the original battery was more than ready to be replaced. The phone had lived on the charger periodically for up to a whole day (I work from home so sometimes I don't unplug it).
    02-18-2016 10:11 PM
  10. harlemyin's Avatar
    i have the same problem, after some test, i think my battery is fine, it cause by OS or charge software.
    updated from 8.1 to wp 10 few weeks ago, then i faced this problem, it was not seen by wp 8.1.
    this week i use aida64 to watch the process of charge, according the basic knowledge of li-on battery, if charging Amps lower than 100ma, the charge-chip will shut the charge process off, and think the battery is now fully charged.
    aida64 can show charge rate of battery, shows it as mw, mw=ma*v, fully charged li-on battery has voltage of 3.8v, it means when charge rate lower than 400mw lumia 1520 will shut the charge off, and shows 100% fully charge of battery.
    but during the observation i found, in wp 10, it the charge rate can be lower than 400 mw by 80% charge, and than suddenly shows 100% fully charged.
    that cause the problem, actually it is only 80% charged, but shows 100%.
    if the battery is defect, we will see the same problem, but i test it another way:
    when charge rate is below 1000mw, i stop charge, and use phone for 5 to 10 minutes to waste 2% battery, then charge it again, it will start from 3500mw charge and slowly down to 1000mw, Continued for half hour, in this half hour it will charged from 78% to 85%, i repeat this method, finally get my 1520 really fully charged.
    before i get 100% to 80% for about 10 minutes using, because it is not really 100% charged, only the charge Amps lower than 100ma,and just 80% been charged.
    after this method, i get very normal Experience just like by wp8.1, no more suddenly turned off by 20%, or very quickly from 100% down to 80%.
    but it will not fix the problem, i must use this method by every charge, otherwise, using normal charge, it will just be charged for 80% or 70%, and shows 100%.

    the perfect charge process for li-on battery is: first high Amps about 1.5a or 2a for a little while, then lower about 1a for a long time untill it be charged for 85%, in the end from 85% to 100% using very small Amps under 500ma to protect battery, when it is lower than 100ma, the chip will shut off charge.

    the problem by wp10, it reachs 100ma too soon, but it is not really fully charged, when you use your phone for minutes, and charge it again, it will be charged again from 1a down to 100ma for a while
    terence chan likes this.
    02-19-2016 01:09 AM
  11. windobuddies625's Avatar
    I'm getting 984mw - 591mw charge rate... That's bad right? Current battery is 84%. Coz i too face the same discharge problem snd battery jumps to 100% while charging.
    02-19-2016 01:45 AM
  12. harlemyin's Avatar
    I'm getting 984mw - 591mw charge rate... That's bad right? Current battery is 84%. Coz i too face the same discharge problem snd battery jumps to 100% while charging.
    yes, under 600mw will get suddenly fully charged, no matter how much is charged, even if it is 50%
    02-19-2016 06:59 AM
  13. Madam ImAdam's Avatar
    Been there, done that. You have a bad battery. Just replace it and you're gold again. Cost less than 20 bucks. I replaced the one in my 1520 and I can get 2 days and some change per charge light to medium use. 3 days with light use meaning just phone, texting and some web. Don't know what to tell you about other phones but this is what resolved my issue.
    My L1520 is now exhibiting all of the same failures reported here with constant shutting down with apparently high charge levels.
    Where did you buy the Nokia BV-4BW replacement battery?

    My last phone was an iPhone 5 that I bought in 2012, I have recently given this to my daughter and we've noticed that the battery on that phone is also behaving similarly, however Apple has a program to replace it for free. I went into the Microsoft flagship store and asked if they could help me with my Lumia battery and the manager's response was that I should contact Nokia Care (which simply redirects to Microsoft) or that I was always free to buy a new phone!!! ha ha ha!
    02-19-2016 02:11 PM
  14. terence chan's Avatar
    Originally posted by harlemyin
    Originally Posted by windobuddies625
    I'm getting 984mw - 591mw charge rate... That's bad right? Current battery is 84%. Coz i too face the same discharge problem snd battery jumps to 100% while charging.
    yes, under 600mw will get suddenly fully charged, no matter how much is charged, even if it is 50%
    Wow... Thanks. I guess that's the exact reason for all the battery charge problem here.
    02-19-2016 03:47 PM
  15. Jazmac's Avatar
    My L1520 is now exhibiting all of the same failures reported here with constant shutting down with apparently high charge levels.
    Where did you buy the Nokia BV-4BW replacement battery?

    My last phone was an iPhone 5 that I bought in 2012, I have recently given this to my daughter and we've noticed that the battery on that phone is also behaving similarly, however Apple has a program to replace it for free. I went into the Microsoft flagship store and asked if they could help me with my Lumia battery and the manager's response was that I should contact Nokia Care (which simply redirects to Microsoft) or that I was always free to buy a new phone!!! ha ha ha!
    I talk about it in this thread.
    Madam ImAdam likes this.
    02-19-2016 08:50 PM
  16. terence chan's Avatar
    This thread is getting long.....
    So, to sum up the situation here, there are three possible explanation to the problem encountered here:
    1. The battery is old and is over its recharge lifecycle
    2. The OS battery level agent is bugged and not reporting accurate battery level in case of unstable battery voltage under load
    3. The OS has bug regarding charging of the battery and is cut current supply to the battery pack before it was fully charged.....
    02-19-2016 11:01 PM
  17. Mike Nelson5's Avatar
    I was having a similar issue with my 1520 long story short it was indeed the battery and after replacement I am happy to report I am getting 18-24 hours out of build .107 with moderate use on my 1520. My old battery was pushing over two years old.
    02-20-2016 06:55 AM
  18. windobuddies625's Avatar
    I was having a similar issue with my 1520 long story short it was indeed the battery and after replacement I am happy to report I am getting 18-24 hours out of build .107 with moderate use on my 1520. My old battery was pushing over two years old.
    How much did u pay to replace the battery?
    02-20-2016 06:56 AM
  19. terence chan's Avatar
    ummm.... How am I supposed to disassemble a 1520 myself for the battery, that's the question.
    02-20-2016 09:50 AM
  20. jpminou's Avatar
    ummm.... How am I supposed to disassemble a 1520 myself for the battery, that's the question.
    02-20-2016 11:36 AM
  21. terence chan's Avatar
    The problem is.....
    How I can obtain the screen guard for separating the back cover from the screen unit and how I can obtain the heat spreader afterwards?
    02-20-2016 12:23 PM
  22. dajma00's Avatar
    What is the behaviour on 8.1? On w10 battery problems are there even on the 950s....
    02-20-2016 12:36 PM
  23. terence chan's Avatar
    What is the behaviour on 8.1? On w10 battery problems are there even on the 950s....
    It was normal. Normal full charge and discharge. Roughly 9-10 hours of life on a full charge with medium load.
    On w10m, sudden death within hours.
    02-21-2016 01:11 AM
  24. Jazmac's Avatar
    ummm.... How am I supposed to disassemble a 1520 myself for the battery, that's the question.
    Its easier than you think. If you've ever removed a Speck case, you're already know how to remove the back of a 1520. There is a tiny single screw between the sim cards you have to remove but once removed, not a big deal.
    Here is a slightly better video for the job. Up until the 3:00 mark, they are removing the battery. This video is about replacing the screen but what you need ends about 3 minutes in.

    Madam ImAdam likes this.
    02-21-2016 02:28 AM
  25. henry-c-n's Avatar
    Correction. Battery drain became severe again, so I switched back to 8.1 and all is fine. It is not a battery problem on my phone but a software issue.
    02-22-2016 08:38 PM
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