Battery level software bug

All of a sudden the battery level of my iPhone 5 started to go down from %100 to 30, 20, 10 then 1% in less that a minute and then shuts down!! This happens sometimes after just a few minutes of unplugging the phone from the charger. This problem appeared only two weeks ago so I spent sometime searching for a solution or similar stories, and am certain that the battery charge level calibration in the new iPhone software has a bug in it..!! I am sure the capacity of the battery is fine, its just the charge level drops for some reason and the phone shuts down immediately though the battery is still full because when I plug it to the charger it takes a minute then it turns on showing 100% charge !!

As an update, I restored my iPhone to the factory settings but unfortunately it didn't work. I don't think I will take the phone to any Apple shop because there is no one in my city and the closest is around 40 miles away! Also my phone is just less than 1.5 years old so the timing for getting a fault was just perfect after the end of the warranty, so I guess I better fix it myself (most likely change the battery first).

Similar Messages

Kernel Panic at low battery with MacBook bug found - with solution

Hello All,
I think I've found a bug with Leopard concerning laptops. I started a thread which I'll link to below.
http://discussions.apple.com/thread.jspa?threadID=1219413
Other people have had this same issue - I've seen it on a few different posts. Does anyone know the best way to contact Apple regarding this? I don't know how active they are in reading this forum, and I want to make sure they know about this, as it's probably something that can be fixed with an OS update.
To summarize, I'm including a couple of key posts:
Posted Nov 4th 2007...
Hello,
I just got one of the new November 07 MacBooks. The machine is great, and screams with the pre-installed Leopard.
First thing I did was plug it in to charge as I started configuring software. Once it was fully charged, I pulled the plug, and began using it on battery. My plan was to calibrate the battery, by running it all the way until it forced a sleep, then shutting down and plugging it in again, as Apple recommends.
Problem is, I never got the "Low Battery" warning, or even the sleep warning. At around 10 minutes of power left, I simply got a kernel panic. A few seconds later, the laptop just switched off.
I plugged in again for a few minutes, then ran it down again to see if I could reproduce the error, and I did get the low battery warning.
The next time the battery ran down, it gave me the kernel panic.
Is this happening to anyone else? Is it a new MacBook problem, or a leopard power management problem? I'm having no other issues at all with the MacBook or Leopard. Any help would be appreciated.
Thanks!
Nov 12th, 2007...
Well, It's been a few cycles since the first one, and all is well. I'm getting the low battery warning when it runs low, and no kernel panics (knocking on all available wood). If I start having problems in the future, I'll update this thread, but for now I'm marking it answered. It was probably Leopard not reading the uncalibrated battery correctly.
Dec, 31st 2007.....
Hello all,
Short followup here: I've have 30 successful cycles after the first couple of kernel panics, and it's time to calibrate the battery again. I tried to do it yesterday - charged the battery all the way, used the macbook while plugged in for two hours, unplugged the adapter and continued to use it until I got the low battery warning. I shut down everything and let it sit - waiting for it to go to sleep. Instead, I got a kernel panic, and the computer shut down. It would not restart until I plugged it in, but I know there was some battery left, since it panicked at 2% battery. I let it charge for an hour or so, then used it again until I got the low battery warning. This time, it went down to 0%, but panicked and shut down instead of going to sleep.
I'm trying this again, after charging all the way last night, and just leaving it on to drain. I'm at 20% right now, and I'll post to let you know what happened.
Dec 31st, 2007....
Hello All - I think I've figured this out. Looks like a software bug with Leopard.
I did get another kernel panic just now at 0%, after the low battery warning. But then I had a revelation. In trying to calibrate the battery, I had set my energy saver settings to never sleep under the battery settings - so I could leave the notebook overnight to drain. I gave it a bit of a charge, then set the battery setting (in energy saver) to sleep after 20 minutes. I restarted, used the computer for a while, got the low battery warning, the computer went down to 0%, then went to sleep as it should.
I believe that since I had the computer set to "never" go to sleep, Leopard didn't know how to handle it when the battery ran down, and kernel panicked. Perhaps this happens on new MacBooks, because these settings aren't written yet? Regardless, it's obviously an OS level bug here.
For those having the problem, make sure your battery settings under energy saver are set to allow sleep after a time.

Start here:
_http://www.apple.com/feedback/macbook.html_
Joe

10.5.8 won't show UPS battery level

I just installed an APC Smart UPS 1000 VA UPS to my Mac Pro server. The USB cable is plugged in and the UPS battery is fully charged according to the display on the UPS itself. The Energy Saver control panel is the APC preferred control method (they do not supply software for MAC OS X after 10.4) and all the controls appear as expected with the exception that the Battery Level indicator at the top of the Prefs panel shows 0% full.
I've unplugged and plugged it back in to no effect. I restarted the server. I turned off the power at the wall switch and the UPS ran the server with no dramas for about 10 minutes. Nothing I tried had any effect.
There is nothing in the APC support site other than instructions for using Energy Saver panel.
Our power here has been pretty flaky this year and I want the server to gracefully shut down after about 10 minutes of an outage. It won't work if the UPS won't talk to the copmputer.
Steve

Have you checked to see if another USB device works on the USB port the UPS is connected to?
You could try some of the suggestions for USB ports not working:
USB and FireWire Quick Assist
http://support.apple.com/kb/HT1151?viewlocale=en_US
Common fixes for USB device issues (unrecognized, etc.)
http://www.macfixit.com/article.php?story=20070824012114701
 Cheers, Tom

10.5.2 doesn't fix UPS battery level display

I was hoping this bug in Leopard would be squashed in 10.5.2. Nope!
When I reboot, the battery level display in the Menu bar and Energy Saver Prefs Panel show an empty battery and 0% charge level even though my APC 1500 SmartUPS is fully (100%) charged. The only way to get the computer to recognize the charge level is to put the UPS through a test cycle which resets the USB connection to the computer and forces the computer to pick up the data properly.
This worked properly in Tiger without having to recycle the UPS.
Griff

I'm getting the same issue, sits there at 0%
This is a real pain because I have it set to auto shutdown when the batteries get to 20%. Any power blip causes an immediate shutdown.

Flex 2 14 Battery Level Dropped from 57 to 7 in seconds

I've been using my Flex 2 14 for around 3 months. However, recently I've encounter a situation whereby my battery level had dropped from 57% to 7% in split second when I'm not plugged in. I was wondering could it be an manufacturing defect and what should I do to fix this problem?
Note: I use this laptop while plugging into the charger most of the time. The battery level is usually kept at around 55~60 only with the help of energy manager. Also, I had performed battery gauge reset once.
Any suggestions will be appreciated.

SOLUTION FOUND !
I just found a solution to my battery issue that is apparently due to a bug on the latest update of Snow leopard (10.6.8). Parallels desktop that was in the Dock was making the Dock taking 100% of the CPU activity (checked in the activity monitor) using battery and heating my computer.
After I checked for such cases on teh web (see: http://forums.macrumors.com/showthread.php?t=1181176 ), I removed Parallels Desktop and Windows Applications folder from the Dock and situation seems to be back to normal...
RF

Wireless Keyboard Battery Level Not Changing?

Hi,
I have got a new iMAC machine 21.5" , almost 6 weeks since. I am a regular user. The machine has Mountain Lion OS 10.8.2.
In System Preferences, I can see the Battery level for Blue tooth mouse dropping to 57%, but the keyboard has been showing 100% all the time.
Looks like this is a bug. How do i check the Keyboard Batter Level.
Regards,
Vinay

I bought an 21.5" iMac eight months ago and I did note that the battery level wasn't changing for my Wireless Keyboard as my Magic Trackpad slowly used its batteries up. That being said I changed the batteries in the Keyboard when the Magic Trackpad died assuming the Keyboard was soon to follow and now the battery level is reported accurately. In conclusion I believe that the Energizer Advance batteries that are shipped with the Wireless Keyboard, Magic Mouse and Magic Trackpad had a lot more to do with the problem then the OS. I don't know why only the Keyboard was affected but I do know that now I am using regular Energizer batteries and all is normal as far as usage levels. Hope that helps.

Cannot lower Critical Battery Level in Power Options

I am wanting to adjust the Critical Battery Level in Power Options to something lower than the default 7% that HP has set. When I try to change the number, it will not save and it just magically jumps back to 7%. This means that my laptop will hibernate when the battery level reaches 7% and I cannot turn it back on unless I plug it into AC power. 7% equates to roughly 40 minutes of battery time and I find this setting way too conservative.
I have done some research on this issue and have found the following:
Some suggest that PC manufacturers will somehow lock this setting to an arbitrary minimum and the user cannot change it to anything below this minimum (it appears HP have set it at 7% in my instance).
This link suggests using power.cfg and the command line to make the changes How To Lower the Critical Battery Level to 1% in Windows 7
Steps I have taken to try and resolve this:
I have tried the powercfg.exe method described in the aforementioned link to change the critical battery level to 3% and initially it appears to work. When I open up the Power Options screen, it indeed says 3%. However, when I actually test it out by using the laptop, it will still automatically hibernate at 7% battery level - it simply ignores the 3% setting.
I have also tried using powercfg.exe to change the Critical Battery Action to "Do Nothing" and likewise this setting is ignored and the laptop hibernates anyway.
I have phoned HP support and the only useful information that I got from them so far, is that the PC manufacturer has set it to 7% and it cannot be changed. They said they will escalate this matter to the research team and give me a call back.
I phoned Microsoft support and the consultant seemed to be confident that he could fix the issue but would not divulge the answer because he said that doing so would void the HP warranty and he didn't want to be to one to do that. He suggested that I call HP and request a conference call with Microsoft and they could then fix it. He seemed to be of the belief that if HP has set the 7% minimum that they should be the one to remove the limit.
If nothing works, I wonder if completely formatting the laptop (including removing the HP recovery partition) and then reinstalling a different Windows 8.1 (or Windows 7) will let me have full customization of the Critical Battery Level?
I would really appreciate your thoughts on how to fix this. It really fustrates me that HP thinks they know better and that the user needs to have 7% battery reserved - it is such a waste not to be able to utilize a battery to its full potential.

Hi @Sparkles1 ,
There must be an alternative solution to this.
What is the reasoning behind HP locking this setting at 7% minimum? I understand that a battery should not be run down to 0% as this will damage the battery but 7% is unreasonably high and in fact this does not conform with ACPI standard specification. I refer to the following document: https://msdn.microsoft.com/en-us/library/windows/hardware/dn481320%28v=vs.85%29.aspx
In particular, please see the table where it says that the critical battery level must be set to a value between 0 and 5%
Can you please advise how to change this? I believe this is a software related issue (specifically, the battery drivers). Can you issue an alternative driver to install? If you insist that it cannot be done, I will have no other option than to return the laptop and request a full refund.

N97 mini battery level drops suddenly

I've observed my N97 mini's battery level dropping abruptly from 4 bars to 1 bar (with low battery alarm). The phone's slightly more than a month old and using the latest 11.x.x firmware. Did a bit of googling, and found several suggestions on how to save battery (turn off everything 'smart' on ur phone). That's not the point anyways. I need to find out why the battery level drops suddenly (like what happens when ur battery's dying out), and *not* why the battery lasts X hrs. I'm not sure about this, but I think this mostly happens when the battery level is slightly below max, and I use any app that needs the GPS functionality. But then, there doesn't seem to be any problem with the GPS hardware in the phone, 'coz it usually gets a GPS lock in less than a minute (mostly within seconds). Could it be related to the algo used to show the battery level, or is it that its my battery that's faulty? Any others out there having the same problem?

It's understandable that the batterymeter is not linear (atleast the charge/discharge rates are not). But what bugs me are those sudden erratic drops within minutes (a couple of minutes at times). Anyone who has spent a few days with a dying (rechargeable) battery would know what I'm talking about. It's not a good feeling when u r away from a charge source, and you decide to use one of those power hungry things (like Wifi/GPS) thinking you still have sufficient juice left...and then bam! ... the low battery warning! you just switch off everything, and hope that it lasts till you reach the next oasis. I guess I'd have to analyze this a bit more to understand if its some specific app that causes such behaviour (as mentioned in my original post, i doubt the GPS apps currently). If it happens too often, and even with 'normal' voice+text kind of usage scenarios, its time see Nokia Care I guess. The reason for this post is to know if this behaviour is observed by other N97 mini users as well..then I know there's no point in taking it to Nokia Care.

How can I get the battery level of a connected Bluetooth device on my iPhone 4S?

My Bluetooth device is the Merkury Hexagon Bluetooth speaker, I want to know how to get the its battery level, In the manual, it says there: "Speaker battery indicator will show right on your media device (iOS support only)
Additional details:
- I have the latest iOS
- Not jailbroken
- The speaker doesn't have a "battery indicator" on it

this is not a build in part of any bluetooth profiles so to get that feature one needs third party software from the maker of the bluetooth device installed on the device in question
so maybe you should look for apps made for mercury hexagon in app store?

How can iOS5 be a software bug and only effect some iPhones?

How can IOS 5 be a software bug and not effect every device running that firmware? Could it be a hardware issue? Has anyone noticed in Settings>About>Diagnostics there are loads more logs about crashing/low memory/ and many others since IOS5?

It probably has something to do with settings. I haven't had any battery drain issue on my 4S (which started out with settings I restored from a backup of my iPhone 3G), but I had extremely rapid drain on my iPad 1 when I upgraded to iOS 5. I figured out quite quickly that it was the auto time zone support, and turning it off made things basically perfect again. I suspect it might be because I was previously using iOS4 on the iPad, and some setting or something was creating the problem, which was absent on the iPhone.
Of course, that's pure speculation— if Apple has it figured out, they could choose to transparently explain what exactly the bug was (though I suspect we won't get any details like that)

How to check battery level?

Is there a way to check the battery level on the iPod Touch? I recently acquired a new 32 GB Touch, and the first thing I did was upgrade to the 2.0 software. I have been unable to find an option or menu that will tell me how much battery life I have remaining.
In looking around I was able to find that on the iPhone there's a Settings > General > Usage menu, but I don't have that on my Touch.
All I ever get is the 20% remaining warning message. Is there no other way to determine how the battery is doing?
Thanks for the help...
-Gary

Hard to believe they don't have something that tells you where you're at. The icon is okay, but is not as helpful as an approximate percentage or number of minutes remaining. I realize battery life remaining can change drastically, say if you start watching a movie, but it would be nice to have something a little more substantial.
I submitted feedback...thanks for the link.
-Gary

Inaccurate battery level

Here and in other places, I have seen several complaints about lack of a correct battery level indicator. This seems to be the case with more than one phone model. Considering short battery life, it is a real problem that battery level cannot be checked with any accuracy. I sometimes have 7 bars when I turn off my 6220 classic, and 4 when I turn it on again after a short while. This shows that the firmware checks battery level very seldom or that the procedure has very little precision. Checking with PhoNetInfo or NSysInfo gives the same result. They seem to reflect the firmware's reading.
It cannot be so difficult to make the firmware check more often. Why has this not been done?
Is there no software that is capable of doing its own direct check?

it's not difficult to have the software or firmware that check batt level more... pool more but:
- The more you do, the more batt it's used... therefore shorten your batt life again.
- The batt has IC chip built in, and the batt after you use a while capacity is less and less and your chip may malfunction, which may give you incorrect value and batt life shorts.
Even if you turn off your phone it still used the battery as if you set alarm and turn off, it will turn on and sounds.
This is a feature too that ppl want...
Hope this helps

1.9.5 Software Bugs

1.9.5, build 17.17 was applied to my box this morning. I now have the following software bugs.
Some programs are missing program information such as an episode of Homeland on Showtime 865 9:00pm 12/10. I had previously recorded this episode and remmber seeing episode info.
Earlier today, stoping a DVR recorded show resulted in going to live TV vs. the program menu to resume, play from the start, delete, save. This seems to be working now.
Under manage series recordings, many of my series now show up as manual series vs. having their correct tiltle. The tilte appears if you go to that manual series.
A new feature to undelete shows seems to work and is much appreciated.
Bottom line Verizon, your newest DVR software pales in comparison to my 2001 Sony TiVo. The Tivo is faster, more user firendly, much more reliable and does more and was built in 2001. Yes, a 12 year old machine and it's software is better than your current high end box.
You should fire whoever tests your software. There are no reason to have these kinds of software bugs.

I have a very similar problem with the software upgrade which affects my DVR info. I too have "Manual Series" listed under the "Manage Series Recordings" section of my DVR for about 10 of the tv shows that I have tagged to be recorded weekly. In addition, I have lost the ability to actually manage these series in that I cannot change the priority order of their recording preference.
I've tried twice to report this problem to VERIZON's technical support staff, but met with indifference in the first attempt (a guy recommended that I replace my DVR with a new one - an utterly ridiculous suggestion), and in my second attempt I got a somewhat helpful lady who couldn't correct this glitch and was unaware of others having same problem but promised to send it up the flagpole to higher level tech folks (best action that I realistically could get).
As I told VERIZON's techies, I likely was not the only customer experiencing this same problem - and your posting confirmed my hunch. I agree, VERIZON leaves a lot to be desired in the pre-testing of their software "upgrades".

Px4-300d shuts down/powers off while on UPS battery, regardless of remaining battery level

Upon line power failure, the UPS is instantly available to supply power to the px4-300d. The UPS is adequately sized to provide well over an hour of runtime during a power failure. The only way to have caching operate is to have a UPS connected. With the UPS connected, the NAS sees the UPS, the current power condition, and an accurate battery power level (%). Once the power fails, the unit begins its shutdown process and completes gracefully, even though the remaining power in the UPS battery is still near 100%. The whole point of having UPS backup is to keep the device running for as long as possible during a power failure, and then to gracefully shut-down the device should the UPS battery level reach a critical level and line-power still not restored. This is MANDATORY to be addressed in the next firmware release, or provide access to a configuration file that specifies the battery level percentage which triggers a shutdown. Why choose this "Enterprise Quality" storage solution if during a power outage it shuts itself down while everything else is still operating? Makes absolutely no sense.
Solved!
Go to Solution.

Hi easy-e,
What is the firmware version on your device currently?
LifeLine-based network storage devices should remain up and running normally using only UPS battery power until the UPS reports remaining battery is less than 3 minutes or below 5%. At his point, device shutdown will be triggered and your network storage device will gracefully shut down.
Have you checked to make sure it is compatible?:
What Universal Power Supply (UPS) models are compatible with my ix or px network device?
APC UPS not working with network storage device
If it is not shutting down properly, I would suggest contacting technical support to see if they can troubleshoot the cause of this problem.
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Battery level in wireless keyboard & mouse

I'm using my Mac Pro with the Apple wireless keyboard and the new version of the "two button" mighty mouse wireless. Every once in awhile the mouse or the keyboard or both go on hiatus - they lose the connection and/or become unresponsible or slow to respond. Sometimes replacing the batteries helps, other times it doesn't. I hate to keep replacing batteries before the existing ones are "used up". Is there some hidden meter or system information software that can "read" the amount of charge left in a wireless mouse or keyboard. I use either Duracells or Energizers so I'm not off with cheapo batteries.
Thoughts, advice?

Hi Marc,
You can check the battery level in the keyboard and mouse from within the preferences of the keyboard and mouse.
I'm not in front of my Mac so can't give the exact terms, but I hope this gets you in the right direction.
A

Battery level software bug

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