08-22-2013, 10:51 AM #1
- 47 Posts
Hello guys, I am experiencing some crazy discharge times with this lovely phone. I mean it can barely last 2 hours when playing games or like 3 hours of surfing. Whereas my 808 easily sports 6-7 hd playing hours and it has smaller battery(I realize that it has smaller screen and res as well, but I mean cmon the difference can't be that huge). Screen is on brightest. I am always on 2G, wifi when surfing. Only background apps are battery and lock screen changer. Anyone else experiencing such short battery time? Any ways to fix it?
- 08-22-2013, 11:54 AM #2
Surfing depends on what your looking at, how often your switching pages, how good your connection is, etc. Most phones I have had drain rather fast when I am on the internet continuously for a couple hours. (I also keep screen at highest brightness setting).
08-23-2013, 12:03 PM #4
- 1 Posts
I too was facing some strange battery drop after the Amber update. But cant be sure it is the Amber or apps/app update after that. The issue was the battery would show 100 after charring and then drop to 67% after a few seconds. this was happening for a few days so I stopped, 3G, Tap to wake, still the same. Next was a reboot and it looks like is back to normal.
So greynightshirt has the right idea of restarting after an update/installing apps.
Really like the features of Tap top wake so hope this reboot sorted out my issue and I can turn it back on.
820 rocks :)
- 08-23-2013, 03:21 PM #5
Depends of wich games you are talking about and what sites too.
But according with this blog, even 820 getting better after some updates (includes Amber), that's pretty normal.
I think the 1.5Ghz processor is a bad choice for 1650mah battery. Because my friend have a Lumia 720 and there's a HUGE difference on battery life. HUGE! Something around 30% or more! Windows Phone doesn't need these CPU, that's I can guaratee when I compared with 720. Bad choice from Nokia.
Last edited by Rodrigo Mendes; 08-26-2013 at 10:31 AM.
08-25-2013, 12:43 PM #7
- 3 Posts
I have had my 820 for 10 months now and I have only recently noticed the rapid battery drain. This started a few weeks ago as before I had no problems. My girlfriend has the same problem with her new 820. What I did was to get an app to rapidly discharge the battery till it's dead. I did this twice. Something about calibrating the battery to the OS so it doesn't think a half charged battery is 0%. I did not try this on my g/f's phone. Mysteriously both of our phones quit this strange rapid discharge in the last couple of weeks, perhaps some software fix was implemented. I usually plug in my 820 when I go to bed and last night I forgot, I still had 80% battery left this morning! My g/f's 820 went two days before she plugged it in @35% left! So whatever was wrong was fixed. We do not have the Amber update yet. I am very happy with this device.
09-09-2013, 11:35 AM #9
- 4 Posts
I have been monitoring what the phone / battery does and I've come to the conclusion that WP8, the phone or the battery is LYING.
For instance, disabling a lot of "phone home" style apps and features, I reduced my discharge rate to between 1.5 - 1.9 % per hour.
Then periodically, say about once every 3 - 4 weeks, you get the "massive battery drain" (usually in my case, overnight).
For example, last night, I left my phone, showing about 95% battery. 6 hours later or so it showed 30% - while in standby at night!
I rebooted the phone, still said 30%. I plugged in the charger, in just 1 hour it had gone up by 60 to show 90%! The charger isn't THAT good! I believe a bug misreports the battery level.
Sometimes, turning off the phone and removing the battery, somehow gives you a higher battery level when you start the phone again!
Why is it so hard to get an accurate battery level with WP8 / Lumia 820?
- 09-15-2013, 05:10 PM #11
I did not get rid of the battery apk, I just changed to a different one. The first one I had (rated the best) worked fine until it had two updates then it got twice as big (mb's) and started killing my battery twice as fast. I deleted it and tried another which helped my battery last at least two to two and a half days on a full charge. There are days when I don't use the phone much that it will hold a charge forever almost, its been 12 hours since I charged it and its sitting on 90% right now. For having the TINY battery it has thats pretty good.I won't say which one I am now using because I don't think that is allowed on the forum. But its a winner. fdalbor
- 09-17-2013, 11:04 AM #13
Like many others, I am seeing very inconsistent battery life. If I reboot and then don't touch the phone, I can get around 1%/hour discharge. However, if I do ANYTHING with the phone, the discharge rate will often increase to between two and four percent per hour.... even if I leave it asleep on the table after closing all applications and leaving it in permanent battery saver mode (with WiFi and Bluetooth on, cell data off).
09-17-2013, 11:33 AM #14
- 2,714 Posts
Uninstall all battery apps, check background tasks in settings, if you have Amber >> (set highest connection speed to the highest, disable double tap to wake and glance) and if possible set brightness to automatic, also check the screen time out duration
09-17-2013, 01:14 PM #15
- 9 Posts
Brightness affects battery life MUCH MORE than you could ever imagine. The AMOLED screen consumes so much more battery when it's all white and very bright that setting the brightness to 'auto' is actually a very good idea. Think about it, what colour are the webpage backgrounds usually? That should answer your question. The difference is slightly noticeable even when I change the Wordament colour from blue background template to black.
- 09-18-2013, 08:14 AM #16
Since Amber my battery discard rate has been all over the place. Sometimes it discharges relatively slowly, other times it discharges very quickly. It seems to have no relationship with what I am doing on the phone as well.
The other thing that I have found is that if I power down my phone with say the battery discharged to 70% and then power it back up again then the battery discharge % is maybe down to 90%. I have changed battery monitors a couple of times and they all show the same pattern so it's a battery issue, a phone issue or an Amber issue.
Has anybody else had this sort of issue?Infinidim
- 09-18-2013, 07:33 PM #19
Well, in my limited experience so far (owned the phone for about three weeks), I would agree with you totally. Very inconsistent. Interestingly, at present I am getting FABULOUS battery life on this latest charge cycle. So far, it has been 22 hours of standby with extremely light use and I am at 85%. Battery saver is OFF. Cell data is off. WiFi and Bluetooth are on. That is about 0.65%/hour. Totally acceptable for standby as that works out to a bit less than 200 hours. I have even opened all the apps on my start screen and did not see a battery drain spike.
The only thing I did differently was I added the Nokia wireless charging shell and charged till full. Can't see how that would affect anything. Although it DID result in an inadvertent battery pull.
One thing I did notice.... and I have seen this a couple times..... is that the battery stayed at 100% for about the first eight hours of standby. Assuming it was really draining at between 0.5% and 1% per hour, that would indicate the battery gauge is not very accurate. Sometimes it behaves that way and sometimes it starts to drop immediately after taking it off charge. It doesn't seem to be related to restarts or resets.
The lack of any meaningful system information is maddening ;)
BTW, I called Nokia yesterday and asked them what the realistic standby time was and they quoted me 360 hours. But they were unable to say under what conditions that was tested. When I said that I had never heard of ANYONE who got that kind of standby time, they offered to have my phone returned for checkout since it is still under warranty (bought it on Ebay for peanuts and was surprised to find out it was under warranty until the end of the year). When I said that might be a future option but was a bit premature at this point, he offered me a free battery... which I accepted thankfully. We'll see if it is any better when it arrives.
I really like the phone but a phone that can't last more than a day or two tops on STANDBY is not my idea of a reliable phone. It will end up dead when I really need it. I know it is not the usual smartphone use profile, but what I really want is a dumb phone when it is on standby in my pocket and a smartphone when I unlock it. Battery saver seems to at least claim to do that. Would that it did ;)
Last edited by pgoelz; 09-18-2013 at 08:30 PM. Reason: Clarity
- 09-20-2013, 07:58 AM #20
I am trying to track down why we have the inconsistent power drain as raised by pgoelz and also myself. It don't think that it is the "battery" apps as they should only be seeing a data area from the operating system / firmware. I always close all the apps when I have finished with them. I only have 6 background tasks running on my phone yet I have this random major battery drain sometimes. Powering down the phone and restarting it nearly always seems to stop the issue which says to me that it is a rogue process that causes it but which one I have no idea. Does anybody know of battery app that monitors down to program / process level. The other thing that I am looking for is an app which will show which processes are running.Infinidim
- 09-20-2013, 10:19 AM #21
I am currently using Battery Pro+ and it does not seem to cause increased battery drain. It also doesn't DO much, so......
As for a process explorer app, from what I have read, these are not possible in WP8.
I am suddenly getting decent battery life the last two charge cycles. The only things that I changed were adding Battery Pro+, deleting one or two unnecessary apps that served up ads, installing a wireless charging shell and disabling automatic phone update checking. I have no idea if any of this is responsible but I am currently getting a consistent 1%/hour discharge rate in standby (cell data and location services off, WiFi and Bluetooth on). This used to be variable between 1% and 4% per hour.
There also seems to be an inconsistency in the battery indicator that has been noted elsewhere. Sometimes after charging to an indicated 100% it will take several hours for the display to drop to 99% and sometimes it will start dropping right away.
My theories are 1) apps that stay open in the background or try to download ads in the background in spite of the fact that they do not show up as active background tasks or 2) stuck processes. But without useful system tools, it will be pure luck if anyone actually identifies the real cause of the inconsistent standby discharge rates. And without access to the system itself, actually fixing the problem will be even more difficult. From what I have read so far, this is not fixed in Amber / GDR2 either.
A shame.... I like the phone and the OS, but a phone that cannot be trusted longer than a day in my pocket without checking on it is not a phone I want to use long term. Too likely that it will end up dead when I really need it. Gone are the days of the phones that could go a week on standby and still have enough to make a phone call.
09-20-2013, 10:32 AM #22
- 26 Posts
Open IE,close all tabs until U have a white screen.That was what caused the battery drain issue to my 820.As for games,if u play 1gb ram games or something like halo etc. the battery won't last more than 2-3hours
Sent from my Lumia 610 using Tapatalk
- 09-20-2013, 10:48 AM #23
Trouble is that I never close open tabs. I currently have six open, and I am (for now, anyway) getting ~1%/hour discharge rates. Perhaps the improvement you saw has something to do with the CONTENT of one of the open tabs? Or just coincidence?
09-20-2013, 04:34 PM #24
- 26 Posts
Hmmm.I don't think it was a coincidence because my brother's Lumia 620 had the same issue for 2 days until he opened ie (he mostly uses uc browser) and closed all tabs.I now that it seems kinda weird because there is no true multitasking on wp8 but it was the same solution for both our devices and each device had a different page open.
Sent from my Lumia 820
- 09-21-2013, 08:58 AM #25
The more I observe my 820, the more I am convinced that the battery indicator either reads high by about 5% or perhaps rounds up by that amount. If I take the phone off charge as soon as it declares it is at 100%, the battery indicator starts falling right away. However, if I leave it on the charger for another hour or two, the battery indicator stays at 100% for between four and five hours.
Yesterday, I received the replacement battery that Nokia sent me and installed it. It reported 67% initially. After charging for a while, the DT-900 LED turned off. I left it on charge a couple more hours and then started observing it. In standby, the battery indicator stayed at 100% for the rest of the evening (about four hours). Overnight it dropped to about 95% in a total of about 11 hours since it came off the charger. If I assume that the battery indicator either rounds up by 5% or simply is 5% off, that comes out to 5% plus the 5% error for a total drain of 10% over 11 hours, or a discharge rate of about 1%/hour.
Next experiment will be to switch my Google account from manual updates to every two hours and see if that impacts the battery life.
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