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  1. dbam987's Avatar
    The battery life is practically non-existent on my 950 XL... most likely due to the fact I do not own one (yet - a minor detail). Awaiting to see if Verizon and Microsoft will patch things up and allow this device on their network (wishful thinking).

    Off topic: Has anyone attempted to see if a Verizon SIM works on the 950 XL, despite the reports of Verizon not authorizing them on their network?
    11-30-2015 12:37 PM
  2. pvcleave's Avatar
    One thing I just noticed, My phone had dropped very quickly to 79% from 100%. I wrote my note and plugged in into my batter pack. I restarted and it now says 99%. I believe I had this issue when I first got my 1520. I remember thinking at the time I needed to drain it, not to condition the battery, but let the phone know what 100 - 0 was. I am wondering if it is just not accurately giving me battery info.

    I am just throwing it out there, I know it sounds stupid, but I am grasping at straws.
    11-30-2015 12:41 PM
  3. mdbuilder's Avatar
    You know some things about lithium batteries, nice to see! My 950 XL, however, is not acting exactly like this and it perplexes me. Some of this must be a firmware issue, but some may be hardware.

    Time - % complete - estimated time to charge - charge current
    2:45 - start - 63 minutes - 1.8A
    3:45 - 55% - 32 minutes - 1.4A
    4:15 - 71% - 21 minutes - 1.4A
    4:55 - 86% - 10 minutes - 1.2A
    5:10 - 94% - 4 minutes - 0.7A
    5:20 - 98% - 1 minutes - 0.5A
    5:27 - 100% - 0 minutes - 0.4A

    It takes my phone another hour or so for the charge current to fully drop down to 0.08A (which is the phone's operating current, not charge current). The takeaways here are that:
    1. The phone's charge time calculation is WAY off.
    2. Even at 100% the phone is far from truly being in CV mode thus is truly far away from being fully charged
    3. I suspect ONE of the reasons some people are having poor battery runtime is because they think they are starting fully charged when they aren't

    . That's what "they" say, but it clearly isn't true that they don't have a break-in period, they do. I've seen it on every battery powered device I ever had. Aside from the chemistry aspect many devices have a fuel gage that "learns" about battery capacity after a couple of charge/discharge cycles and frequently the very early estimates are wrong until it has had time to learn (making it appear the battery is "breaking in"). For this reason I always periodically run my batteries "into the ground" so that the fuel gage gets to see what the battery's present capacity really is. When I started the test above I started with the battery so discharged the phone refused to turn on. This poor initial estimate/learning not complete may be part of the issue I've outlined above
    "CV mode" is everything below the 1.2 amp point in your table. "Full" is reached when the current required to maintain 4.2V drops to near zero + what the phone is drawing.

    You must remember that the simple wall wart chargers being used here have virtually no intelligence. The actual profile of charge currents is not going to follow the ideal profile because the entire CC phase is fairly uncontrolled and just depends on the difference in voltage between the battery and the power supply.

    In my other hobby I charge various packs of lithium polymer cells with a real battery charger. 4.0Ah, 6.6Ah and 8.0 Ah capacity in groups of 3 to 6 cells in series. I generally charge at 2 times capacity (2C) so for the 8.0Ah pack that is 16 amps. With a real charger the charge current will be exactly 16 amps + or - a few milliamps for the entire first 80% of capacity. You can watch the individual cell voltages and once any cell hits 4.2V the current begins to ramp down such that it does not exceed 4.2V, there is also some balancing going on between the cells to hold the charge back on a cell that is at 4.2 and let it through on those that are a few millivolts low. This particular charger has a few different modes such as fast charge or slow charge, in fast the time to charge completion is minimized and it cuts off the CV phase once the charge current falls to about 1/10th the initial value so 1.6 amps. A few minutes later after charge termination at about 25-30 minutes time elapsed the individual cell voltages will have stabilized at approximately 4.14 V. There is a slow mode which would continue dropping the current to a very low value over a much longer time to get close to 4.2V resting but that takes a while for very little additional capacity gained.

    As far as "Break in" goes, there is a definite improvement in lipo performance over the first charge cycle but it only takes a small hand full of cycles. Cycle 2 is much better, 3 maybe a bit better and by cycle 5 you've basically got the best performance you will ever have...
    11-30-2015 12:42 PM
  4. Musicman247's Avatar
    The battery life is practically non-existent on my 950 XL... most likely due to the fact I do not own one (yet - a minor detail). Awaiting to see if Verizon and Microsoft will patch things up and allow this device on their network (wishful thinking).

    Off topic: Has anyone attempted to see if a Verizon SIM works on the 950 XL, despite the reports of Verizon not authorizing them on their network?
    Hello and welcome! Check out the 950XL hub on windowscentral.com: Microsoft Lumia 950 XL | Windows Central

    There is an article and video there where Dan Rubino in no uncertain terms says and demonstrates that the 950XL will not work on Verizon. Microsoft Lumia 950 XL first impressions and unboxing | Windows Central

    Also, please keep discussion from going off track. There is a thread devoted specifically to this question: http://forums.windowscentral.com/mic...k-verizon.html
    11-30-2015 12:46 PM
  5. kiteless's Avatar
    At the bottom of the stack here. I got my phone on dreaded Black Friday here in the US. It seems to be getting better every day. Before this I had a Lumia 640 with Windows 10 Mobile latest build in slow ring on it and battery life was stellar. Before that I had a Lumia 925 the battery life was "oh kay". It got me through the day, but a heavy days use, not so much. This 925 XL is buttery and wonderful. As I said it seems to be getting better as the days go on. First day was the App Blitz and updates as someone said. I'll be holding onto mine. No way am I returning this awesome phone.
    KickAssLumia likes this.
    11-30-2015 01:21 PM
  6. Starwave's Avatar
    A quick update after doing a hard reset:

    My phone is currently at 70% after setting everything back up, and the estimated battery time shows 18 hours and 37 minutes.. Great!!
    What I did though when I set up the phone now was to change the SIM settings.

    When I first set up the phone, I had no SIM-card in any of the slots, and later inserted one once everything was set up (could this be the issue? I doubt it). However, at that time I selected the default cellular connection profile: "Ultra Mobile". I have now switched to "T_Mobile".

    In the battery test I did in a previous post, where I activated Airplane Mode, the battery didn't drop a single percent in one hour, and we all know what is disabled in Airplane Mode..

    So if you are having problem with battery life, please try to change your cellular connection profile. This can be found in:
    Settings --> System --> Phone --> Sim Settings --> SIM1 (or SIM2) --> Cellular & SIM --> SIM 1 settings. Look for "Mobile Operator Settings".
    Wow, they sure added a lot of steps to get to this setting :P

    UPDATE: It's been one hour, and the phone has been untouched for the entire duration. The battery went from 70% to 68%! The estimated time remaining sits at "1 day" now. It dropped 10% every hour with no use before the hard reset.
    Last edited by Starwave; 11-30-2015 at 02:56 PM.
    11-30-2015 01:49 PM
  7. Ricardo Gonzalez5's Avatar
    Hi,
    All most the same with my Lumia ICON run WP10.586.11 The Battery is terrible bat, look atwp_ss_20151130_0005.png
    11-30-2015 02:32 PM
  8. muness's Avatar
    My battery life was terrible like most everyone else here. Last night I charged my phone fully, let it charge for another hour, rebooted a few times while connected to try to bump the charge. Then did a hard reset and setup up all apps from scratch all the while leaving it connected to my qc 2.0 charger. Today the battery life is amazing with lee's than 1% reported usage per hour when idle (wifi) and 5-7% or so with active usage (25% brightness).

    Differences in the way I configured it this time:
    * on original setup, battery was at 30% vs 100% this time
    * No hey Cortana
    * email sync set to 15minutes Gmail, 1hr outlook
    * Facebook removed, Facebook beta installed
    * only tweetium, no official twitter app
    * I signed up for insider fast and got an update this morning (25 steps on boot, it said it was a configuration update). Build still says 10586.0.

    So way too many variables to tell what made the difference. And it could get back to terrible tomorrow. If I were betting I'd say it was the update or a calibration bug with that's leading it to not fully charge the battery.

    Update: So I just rebooted and battery went from a reported 92% straight down to 80%. I now have no confidence in any of the above...
    Last edited by muness; 11-30-2015 at 03:08 PM.
    11-30-2015 02:57 PM
  9. elindalyne's Avatar


    Phone came off the charger at 10:45 AM. Was at 11% at 12:37 AM the next day.


    Seriously, check what apps you have running in the background.
    11-30-2015 03:00 PM
  10. Uncled1023's Avatar
    http://i.imgur.com/Mtk3A0N.jpg

    Phone came off the charger at 10:45 AM. Was at 11% at 12:37 AM the next day.


    Seriously, check what apps you have running in the background.
    Random question. What app is that?
    11-30-2015 03:06 PM
  11. elindalyne's Avatar
    Battery
    11-30-2015 03:11 PM
  12. Lobbie1978's Avatar
    I've been using the device since last Thursday, and I'm kind of feeling the battery is performing less than my Lumia 920. I'll give it some cycles though. Been really impressed with the device so far. The camera is absolutely stunning. No other device comes close to it.
    Last edited by Lobbie1978; 11-30-2015 at 03:11 PM. Reason: typo
    11-30-2015 03:11 PM
  13. SpinelessWonder's Avatar
    Horrible... I went out to do a photo shoot comparison against an iPhone 6S Plus... after an hour and a half the 950XL battery was down to 35% and the iPhone was at about 80%
    11-30-2015 03:22 PM
  14. phelme's Avatar
    One thing I just noticed, My phone had dropped very quickly to 79% from 100%. I wrote my note and plugged in into my batter pack. I restarted and it now says 99%. I believe I had this issue when I first got my 1520. I remember thinking at the time I needed to drain it, not to condition the battery, but let the phone know what 100 - 0 was. I am wondering if it is just not accurately giving me battery info.

    I am just throwing it out there, I know it sounds stupid, but I am grasping at straws.
    not stupid, mine has very rapid drop from 100% to the low 80s as well. and then it'll hang around there for a while. it's strange. you might be on to something with battery conditioning. I'll have to ask my friend who writes battery charging firmware what might be up with this.
    Last edited by phelme; 11-30-2015 at 04:03 PM.
    npoe likes this.
    11-30-2015 03:26 PM
  15. several potatos's Avatar
    We should get some objective measures of these, then compare them with new battery measures when the next major windows phone debuts. Might put stuff into perspective.
    11-30-2015 03:53 PM
  16. KickAssLumia's Avatar
    @kitelessd

    I moved over from a temporary 640 LTE to a 950 XL as well. I am noticing the same behavior. I would constantly brag about battery life against my wifes nexus 6. Not so much anymore :(.
    11-30-2015 04:49 PM
  17. Michael Dontigney's Avatar
    My battery life is so bad I cannot use wireless or plug into a computer. They do not charge it fast enough to prevent it from draining. This is with airplane mode on, glance off, NFC off. This is not just breaking in. I have never had a battery this bad before.
    This sounds exactly like the WP10 issue I had with it on my 1520.... so it's gotta be the software... On he same device with WP10 my battery drained like crazy and the device was hot.... Downgaded after 4 days and same dice on WP8.1 works great and the battery lasts for DAYS....
    11-30-2015 05:30 PM
  18. Donald Simard's Avatar
    I think literally every new smartphone has a "my battery life is bad" thread less than 24 hours after the phone is released. Alternatively, I do not recall ever seeing an "OMG the battery life is amaaaaazing" thread in my life for any phone whether it is Android or iOS. Maybe the Turbo though, which it should, lol.
    I don't have the 950 - but I can start a "battery is awesome" thread if it would make you smile a little :D J/K
    11-30-2015 05:37 PM
  19. phelme's Avatar
    Re: Rapid discharge from 100% to ~80%

    My buddy who works on this stuff said it could be a couple things.

    Charge levels are estimated through a hard coded "state of charge" curve. Microsoft may have botched the curve or more likely, there was a change at the production factory run that means a new curve will have to be implemented. This is apparently quite common.

    The other scenario is the phone is running does the battery until a certain percentage level is reached. If the phone gets hot right off the charger this may be an indicator of that. Could be a process that kicks in when the charge state is changed. This is uncommon however.

    The battery itself though is likely not the issue.

    In any case my friend said this is all easily addressed in software fixes.
    11-30-2015 05:42 PM
  20. don4law's Avatar
    My battery was absolutely horrible for the first two days. It literally drained from near 100 to almost empty within only about 5 hours. Nonetheless, I read about the "breaking in" period on this thread and decided to wait it out for a bit before returning it. The battery is much better - not as great as my Lumia 640 before this, but much better and acceptable.

    I have read a lot of negative reviews about battery life, if MSFT had some brains, they'd advise customers of this and other issues to expect and they would likely avoid much of the negative onslaught against the new phones that I've seen.
    11-30-2015 06:25 PM
  21. MP3Mike's Avatar
    Battery
    But which one? (Battery app)
    11-30-2015 06:39 PM
  22. don4law's Avatar
    I don't know the science behind lithium batteries, but I can tell you - and based on comments from others on this site - that my battery did require a "break in." There was no change in my usage, yet battery improvement went from dismal to pretty good, but it took about 4 days and numerous charge cycles to get there. This was my experience. Whether it comports with what's supposed to happen, I cannot say ...
    11-30-2015 06:43 PM
  23. MP3Mike's Avatar
    Mine has gotten much better after ~2 days. For the first two days it was eating through the battery at about 12% an hour even when I wasn't using it, but it kept my pocket really warm!

    About the same time the battery usage came into line, and it stopped being really warm, I noticed that it appears like it finally synced all of my text message history from the cloud. (I suspect that Microsoft fixed something on the server side of the text message sync process.) I just wished they fixed the problem that has caused up to 10 duplicates for every text message. (Maybe it created a new one every time the process failed and started over, and that is why some only have 2 dupes, while others have 10.)
    11-30-2015 06:47 PM
  24. robertre's Avatar
    MIne seemed to run down fairly quickly the first day, but every day it is getting better. I easily got a full long day yesterday and put it back on the charger at 2:00am with about 40% left. TOday at almost 5pm (started at 6:30am), I am at 68%. It definitely does not last as long as my 640, but then my 640 did not have to drive such a large hi res display and run a quad core processor. So far I am happy. As others have said, give it a few days to break in.
    11-30-2015 06:52 PM
  25. Mallguvner's Avatar
    When I had a pop3 email not properly installed (Even though it initially said all was well.) I happened to look back in there and it had an error next to my new email. During this period of time trying to figure this out my battery got chewed up. I would look around and make sure something is not dishing out our errors causing the phone to constantly be at a task where it runs itself out. After I fixed the problem my battery has been fairly well behaved after the 2nd day of use. Today I was experimenting with Continuum and that ruined any battery testing since it charges itself up very quickly while you have it hooked up.

    MG
    11-30-2015 07:05 PM
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