Shut down with no warning 49% battery left.

Macbook Pro 15".
This is a brand new battery. I bought it because I was told my laptop was shutting down early with no warning because the battery was bad. Well, this is a new battery and it's doing the exact same thing.
I have NEVER had a warning prior to shut down. And it doesn't go to sleep. It completely shuts off with NO warning and I lose anything I was working on at the time.
There is no way I can recalibrate it according to the many posts already about this problem. They all suggest recalibrating the battery by running off the battery and waiting for the low power message. There is no message. And I can't run the battery down because it won't go down past 49%. Or at least that's what the computer is showing.
Since this is not a battery issue I'm thinking that this is a software issue. Something that happened with one of the leopard updates.
So what now? What can I do software wise to repair or update the battery sensing part of my software?

The same thing is happening to me. Again. Last year same thing happened and a new battery fixed it, but going bad again way before it should. Problem started with computer not waking from sleep, and now the sudden shutdowns. I did update Itunes fairly recently, around the start of the problem, otherwise use 10.4.11 and had not updated anything since the last time I had this problem (curious).
There are an overwhelming number of bad batteries for this machine, I would not conclude it is not the battery and I would turn in the one you just got and try another one.
Also there is another reset to try besides recalibrating, since that is not possible, (PMU?) that I cannot seem to find this time. It did not work the last time but wanted to try it anyway if anyone knows of it, I think it involves removing the battery. Please post it if you know what I am referring to.
I was lucky last time because when I took it in to Apple store it shut off right in front of them at 97% charged!

Similar Messages

Snow Leopard shutting down with no warning is getting more complex!

I have a series 1 Macbook Pro and have updated to Snow Leopard. As with most other people I immediately got problems with the "battery Service" message. So, having read all the various posts, and tried re-calibration, I bought a new battery.
Charged fully and disconnected adaptor. The machine shut down with no warning at about 85%! I tried a few more times after fully charging the battery and it shut down a number of times - 83%, 85%, 89% and 98%. The battery shows a cycle count of 1. The last time it shut down (89%) I decided to try re-starting without plugging the adaptor back in. The machine started and ran up to the point where it properly started Snow Leopard - when it was about to change from the blue screen - at which point it shut down again. I tried this a number of times and it was absolutely conisistant, doing it every time.
I then had the bright idea of plugging in the adaptor but watching the LED to see what happened. The LED came on green for 1 or 2 seconds, then went red. I then immediately unplugged it again. I then tried to start the machine with battery only. It started perfectly and went on running until down to 15% at which point it shut down, again with no warning. Tried re-starting - it wouldn't! Plugged the adaptor in so that it would charge the battery whilst using the machine. Then, much to my amazement, while the adaptor was still plugged in, and the battery was far from fully charged, the machine shut down - again without warning. That's "it shut down with battery installed AND mains connected". The machine then wouldn't start, with mains connected. It would switch on for a few seconds then shut down again. To get it to start I needed to remove the battery and run it on mains only.
That's where I am at the moment, running 'mains only' with no battery installed. It looks as if Snow Leopard sets the battery monitor / charging hardware incorrectly on the MBP. Once set incorrectly it looks as if it loses itself!
Has anyone else experienced anything like this?

It really doesn't get any better! Well, not a lot. I decided that I'd try yet another brand new battery. I charged it fully, disconnected the mag connector and it ran happily without shutting down - hooray. However, after putting out the message about low power and about to shut down, at about 5%, it ran to about 2% and shut down without warning. It didn't go to sleep.
I then couldn't get the machine to start again. I reset the SMC and still no joy. it would start to run, flash the screen a couple of times and then die. To get it to run I had to disconnect the battery, start it, then plug the battery back in again. Snow Leopard does appear to do something odd with the charging hardware. It appears to leave it in an odd state.
You may be right about Battery Update 1.3, but there appears to be no way of installing it under 10.6.8 - unless you know something I don't!
This is the current battery:
Manufacturer:          Sony
Device name:          ASMB012
Pack Lot Code:          0002
PCB Lot Code:          0000
Firmware Version:          102a
Hardware Revision:          0500
Cell Revision:          0303
Charge Information:
Charge remaining (mAh):          3734
Fully charged:          No
Charging:          No
Full charge capacity (mAh):          5205
Health Information:
Cycle count:          2
Condition:          Normal
Battery Installed:          Yes
Amperage (mA):          -2230
Voltage (mV):          11429
As you can see, I'm running 'battery only' at the moment!

MBP shuts down after sleep when 2% battery left

Sorry guys if u find it irritating to see the similar question again n again but i couldnt stop myself from asking this...
          i have my mbp just 3 weeks old and i tried to callibrate the battery just few hrs ago...i continuously used my mbp until the battery level reached to 2% (the warning message showed when it was 6%)...just then i had to received a phone call. When i was busy talking, i noticed that the mbp has gone to sleep mode...but when i returned (2-3 mins later), i found it shut down...
          well, i think it should have remained to sleep mode but it didnt...then after an hour i connected the power cord and switched on and noticed a progress bar which i saw for the first time....i have been charging it for 40-50 mins, now...
          also the health of my battery keeps fluctuating between 95-100 %...istat shows this...is this normal???
          So what i want to know is, Is this normal for mbp to shut down when the battery reach that low?? OR there is some problem in my MBP???
if there is should i be going to my mbp reseller shop for service or it is something i can handle myself????
thanks in advance..

then how am i supposed to callibrate if it shuts down before completely draining the battery???
and what about the battery health % being fluctuating? my battery have completed only 9 cycles and the health shown at the moment is 97%

PowerBook G4 shuts down with no warning

My PowerBook G4 15" Double Layer is sometimes shutting down completely without warming when running on the battery only. Upon starting the computer clock will be set to 1969 (if “Set data & times automatically” is not on in System Preferences). The problem has been present since about two months ago, with the old recalled battery and as well now with the new one, and has not been related to the battery level. Neither it is related to the fact that the computer is being moved or pressed, or used on an unstable surface, since it may happen even when the keyboard or mouse is not being touched. That is, I could not find any pattern that could help discovering the possible cause. I tried resetting the PMU, with no help.
I found out that a problem of "random sudden shutdowns" has been reported in several threads on the MacBooks. I wonder if the problems are related.
Any hint would be appreciated.
Regards,
Valerio
Powerbook 15 High Res 1.67 Mac OS X (10.4.3)

The most difficult troubleshooting occurs when more than one thing is wrong. That may be what is happening here.
The fact that you need to reset the system clock may imply that the PMU is being reset without your help-this may point to battery issues, or power to the battery.
Do you properly your battery? And will it calibrate?
Joe

New IMac shuts down with NO warning - can some one help?

Yes, I have a brand new iMac and five more unopened and out of nowhere - it shuts down - no error message, no freezing - just gone...

Hello FPMS
That kind of sounds like, improperly or not fully seated ram module(s). Try reinstalling them again, pushing with both thumbs real hard.
[iMac (Mid 2007): Installing or replacing memory|http://docs.info.apple.com/article.html?artnum=306204]
Dennis

MBP low power shut down with no warning

In the past, I’ve always been able to rely on a warning window that would remind me my laptop battery was running low and that the screen would be dimmed to conserve energy. Suddenly, that warning is gone...I’ll be merrily cranking along on something (without continually looking at the battery level to notice it’s waning) when BAM. The low battery level triggers a full shutdown with no warning.
I can’t begin to tell you how many documents and changes have been lost in the past few weeks since this began....
This is limited to low battery situations. It doesn’t happen any other time. There’s no pattern to which apps are open at the time.
Any ideas where my warnings went and how to get them back again?
Thanks!
MacBook Pro, G4 PowerBook, G4 tower Mac OS X (10.4.7)

Depends on how long you've being using the battery without complete discharge and then recharge, the battery meter may become inaccurate, and that's probably why your Mac didn't realize the low power and didn't give you warning.
You can re-calibrate the battery meter by a complete discharge immediately follow by a complete charge. Make sure you charge it right after the discharge, otherwise it may went to a protected mode that need to be revived. Note that you should only do this occasionally, keep it charged in usual usage.
If this doesn't seem to work, maybe you should call Applecare.

No low battery warning / shutting down with no warning

My macbook has shut itself down about 6 times when it is on a low-ish power status, and before the 'attach power' warning appears.
There doesn't appear to be anything on the support pages for this - the only ones I can find are from 2006 and relate to the old Macbook. I think it is something to do with the SMC firmware (which I have the most up-to-date - 1.38f5).
Has anyone else experienced this, and is there anything I can do?
Thanks
Paul

please check it out with this utility & report back: http://www.coconut-flavour.com/
I think your battery is bad but you can also try the smc & pram reset.
SMC: http://support.apple.com/kb/HT3964?viewlocale=en_US
PRAM: Hold Command Option P R at startup until you hear the chime twice.

Mac book pro automatically shutting down with a warning

my mac book pro running mountain lion keeps restarting itself showing a warning screen at the beginning of each restart saying there is a problem, what is this caused boy, and what are possible solutions?

Thanks for the response Grant. I had both set to "never" and the power connected. I did however find while searching the forum page, an answer already given to another enquiry. The security/general tab. I had it checked, now unchecked am hoping it will solve my problem. Thanks again, Cebustu.

Computer shuts down with charge on battery and no warning

without warning and plenty of charge on my battery my mac book pro shuts down? if it just sits there in sleep unplugged it seems to run fine, but if its unplugged and i try to use it (with a charged battery) it shuts down with out warning. started about 3 months ago. Is the battery just old..?

It is almost certainly a sign that your battery is dying, timskins.
The problem is that when batteries deteriorate their internal resistance increases and they are no longer able to deliver power when it is demanded, even though they still have the ability to store it. They may chug along providing low power for quite a bit longer, but when your computer suddenly needs a bit more (because of increased CPU or GPU demand, or the HD spinning up or whatever) it is unable to provide it and the computer shuts down unexpectedly.
Think of it like driving a car with a bad fuel pump. Your car is driving along a highway with a full tank of gas. Its running smoothly enough. You put your foot down to accelerate up a hill or overtake a another vehicle and the engine dies because the fuel pump can't meet the greater demand for gas. The tank is still pretty full but the fuel can't be pumped in fast enough to keep it running in a high demand situation, so it shuts down.
See the section dealing with increasing internal resistance in batteries at http://www.batteryuniversity.com/parttwo-31.htm for more about such things, or http://www.buchmann.ca/Chap9-page1.asp for a longer, more technical, account.
Once this starts happening the only options are to get a new battery or to avoid any work that makes much demand on power (like visiting a "Flash" based website or, when it gets bad enough, even spinning up the HD from a stationary situation.) Unfortunately even with light use the battery will soon reach a point where the regular peaks of CPU and HD use will become too much for it and you will suffer more and more unexpected shutdowns until the battery is replaced.
My suggestion would be that you take the battery to an AASP or Apple Store, where they can quickly "stress test" the battery for you to make certain that in your case this is, indeed, the problem.
Rod

IPhone 5 shuts down with 20% battery life

This started after installing iOS8 (currently on iOS 8.1.1): At around 20% battery life, if I'm using any app at all the phone will shut down like there's no battery left. It will not restart. Plug it into the charger and get the display showing there's no battery life and it needs charging. After about 30 seconds, phone powers back up and shows 20%+ battery.
I have tried draining it to shut down, but it's hard to get it past 20%. I have made sure there were no background apps running, turned off just about everything I could. No joy. And this never happened under iOS7; it started right after I installed iOS8.
I've seen threads on this behavior, but no definitive answers. Thoughts?

See if your phone is one that Apple has noted as requiring a replacement battery: https://www.apple.com/support/iphone5-battery/
~Lyssa

IPhone 5 shuts down with the battery at 40%

I'm having issues with my iPhone 5. It regularly shuts down with the battery being far from 0%. When I took it to the apple store, a "genius" said that the battery is fine and restored the phone to the factory settings. I set it up as new without touching the backup (with iOS 8), but the iPhone keeps shutting down with a half charged battery. If anythings, the problem only became worse with iOS 8.1. I would appreciate any suggestions on how to fix it.
The iPhone is out of the warranty and is not eligible for battery replacement. Another issue I have is that the home button often responds with a delay, but I don't know if it's related to the main problem.
Thanks

Here's the battery info from iBackupBot:
CycleCount: 368
DesignCapacity: 1430
FullChargeCapacity: 1200

My iphone 5 is shutting down with 30% battery remaining

My iphone keep shutting down with approx. 30% battery remaining, sometime 18%, I have to plug it to turn it on again, it is very frustrating. I did reset the phone and it still doing it. PLEASE HELP!

Sounds like a definite hardware problem. You should still be in warranty, so head over to an Apple Genius Bar and they will either repair or replace it. A replacement will be much more likely, and it's free (if in warranty).
Good luck!

Yet another Shut Down Problem - No warning

Same problem as countless other users on here... 17 inch Mac Book Pro Shuts down with no warning at exactly 48% battery life with no ac charger plugged in. I'm not 100 percent sure of this but Im pretty confident it only started doing this after the last major software upgrade to 10.1.11. I havent yet migrated to Leopard due to reported software issues.
battery seriel number: No.6N6261VRU50A
But like many others have stated on this forum, Im doubtful this is a battery fault, more likely a software bug. Upto the software update my battery and computer were faultless and the battery always decharged properly and with warning before shutdown.

The same thing is happening to me. Again. Last year same thing happened and a new battery fixed it, but going bad again way before it should. Problem started with computer not waking from sleep, and now the sudden shutdowns. I did update Itunes fairly recently, around the start of the problem, otherwise use 10.4.11 and had not updated anything since the last time I had this problem (curious).
There are an overwhelming number of bad batteries for this machine, I would not conclude it is not the battery and I would turn in the one you just got and try another one.
Also there is another reset to try besides recalibrating, since that is not possible, (PMU?) that I cannot seem to find this time. It did not work the last time but wanted to try it anyway if anyone knows of it, I think it involves removing the battery. Please post it if you know what I am referring to.
I was lucky last time because when I took it in to Apple store it shut off right in front of them at 97% charged!

Macbook Pro shuts down with 40% battery left... does not just go to sleep

Hi,
Our MacBook Pro has started to shut down with about 40% battery left. After it has shut down, I press the button underneath the computer and 2 our of 5 lights light up on the battery. I wouldn't mind if it just went to sleep but I totally have to restart it and lose everything I have been working on when it died. The computer used to go to sleep when the battery got to 0%, then I could plug it in and keep working.
I don't know if it's a software issue or a battery issue or a firmware issue.
Any tips would be MUCH appreciated.
Thanks a lot.

I have read so many articles across the internet with people experiencing this problem. This is the conclusion I came to.
I could not calibrate my battery as my system would hard power down before it got anywhere close to draining the battery entirely. The last 10 cycles on my battery were attempts at calibrating. The most common cause would be because the battery in our macbook pro does contain something close to the charge being reported by the computer, but cannot deliver it. Your fuel gauge is probably not incorrect, especially when the leds on the battery itself show a charge that should be capable of running the machine. Even if it is not calibrated correctly. The internal resistance of the battery itself has compromised the batteries ability to deliver the amperage necessary to run our machines. After finally realizing this, I turned my screen brightness all the way down, and sat all my power settings to max battery life without allowing the machine to go asleep. Then, I went to sleep myself =). In the morning it appeared as though I had a successful calibration and the machine did not power down hard. Depending on how bad of shape your battery is in, this may or may not work. Either way, it didn't matter much. Even with my fuel gauge being correct, if my screen brightness was cranked up and I was doing anything somewhat processor intensive, my battery failed to provide the needed amperage and powered down my system hard again.
The battery really does have the amount of power it says, it just cannot deliver it as fast as needed. At a slower rate, it will work. A replacement battery is needed. I cannot explain the strange jumps/dips in storage capacity but would guess these numbers are a guide, and more than one environmental factor can change this number. Also, once the internal resistance builds up inside the battery and the inability to calibrate happens, it compunds the problem.
My machine is a first gen intel macbook pro. A few months after I bought it, I had battery problems and apple replaced my battery. My machine is 31 months old, it's battery is somewhere around 27. I tried to get apple to replace my battery and they told me no. I was 40% healthy @ 207 cycles. Many people complain about this but it seems reasonable to me, I didn't argue. I do believe my battery failed prematurely, however, it was due to a few factors and I do not think it was the batteries fault. My machine was one of those nice overheating first generation macbook pros. To make the matter worse, one of my internal fans stopped working. I knew this as my istat pro program showed me 1 fan @ zero rpm. I figured I had applecare and had work to do, so continued to use the computer for several months. I did quite a bit of video encoding and processor intensive work. When I would get to work in the morning, my granite desktop was really cold, however, after a half hour or so with the macbook pro running the heat would dissipate through it and warm it up nice and comfortable! lol, some may not think this is funny, but it worked well for me. I frequently had over 180 degree cpu temps and the bar above the keyboard being too hot to lay your hand on and keep it there. I am sure some of this excess heat contributed to the premature failure of my battery. The type of batteries in our machines are killed by heat, charge amount, cycles and age. Probably in that order for most users. So, can I blame apple because my unit ran hotter than it should have because their fan failed! eh, maybe, but I am happy with this laptop overall. I have never had a single laptop for more than 15 months and have had this one for over 30 now.
I ran across this site somewhere, it may have been another user on these forums, I cannot remember. http://www.batteryuniversity.com/partone-19.htm On this page, it talks about our batteries, the effects of heat and level of charge in combination with age. At 77 degrees F., charged to 100% (which is very typical of our machines, or close to it) after one year the battery is 80% as good as it was when it was new. At 32 degrees it is as 94% as good as new after one year. Jump up to 104 F. and the battery is only 65% as good as new after 1 year. Sometimes my computer is running for days and sometimes the environment is warm. Add that to the heat produced by the machine itself and I bet the battery sustained 100 degree temperatures for long periods of time. Just for fun, at 140 degrees and 100% charge in our lithium ion batteries, after only 3 months the capacity is only 60% of its new capacity.
Anyways, that is my battery story. Sum up. The inability to calibrate is due to the batteries increased internal resistance and inability to deliver the charge at a rate needed by your computer even though it appears healthy, or somewhat healthy. You may be able to calibrate by making your laptop drain less power, turn screen brightness all the way down, turn airport & bluetooth off, let hard disk sleep, and let it go. But that will not stop the hard shut down problem, although the fuel gauge will be more accurate. Think of it like this. a 100 gallon fuel tank on a car full of gas. The fuel gauge is correct, it is full. However, the fuel line connecting the fuel tank to the engine is made of a space age material that shrinks as it ages and is exposed to heat. Eventually the fuel line shrinks to the size of a coffee stirrer or small straw. When the motor is turned off the fuel seeps into the small straw. Start the motor, it begins to sip the fuel from the straw. Rev it up (encode video), the motor demands more gas but cannot get it. The motor stalls out (your computer shuts off). Same idea somewhat. Sorry so long

My iPhone shuts down with certain apps and says dead Batt. with plenty left. Now it wont turn on after starting up and turning off many times

I got my Dads old iPhone 3GS for Christmas and reset it to its factory settings. It had this problem with my Dad to, thats why he got a new phone. It was claiming that the battery was dead when I opened certain apps eventhough it had plenty of battery, It made me charge it and then said it was plenty charged. Why? That happened multiple times. That's what happened to my Dad as well. This however, is me only. O.K. so, the other day, it did it's battery dead shutdown thing, so I plugged it in, but it kept starting up, then shutting down again, starting up, and shutting down again. Now I've left it on the charger for about a days, it's not on the charger now, and it won't turn on. Help!!!!!!

Basic troubleshooting from the User's Guide is reset, restart, restore (first from backup then as new). Try each of these in order until the issue is resolved.
If the issue persists, take the device to Apple for evaluation and possible replacement.

Shut down with no warning 49% battery left.

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