HT1446 No low battery warning before it shuts-down

Under MAvericks OS-X, our MBP isn't giving a low battery warning before it shuts-down. And yes the battery status icon is active in the status bar.. So why no warning??

Read this earlier non-Mavericks discussion: https://discussions.apple.com/message/11218017#11218017
Phil

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Ok. so I updated to iOS 5. Downloaded it from iTunes and all. But in the middle of installing the iOS, i fell asleep. not knowing my computer was at a low battery charge my computer shut down. I did a DFU already but i'm not sure if it the os is complete.

Ok. so I updated to iOS 5. Downloaded it from iTunes and all. But in the middle of installing the iOS, i fell asleep. not knowing my computer was at a low battery charge my computer shut down. I did a DFU already and it worked but i'm not sure if it the os is complete. Is It??

Restore to factory settings. That will use the latest iOS and then restore from a backup.
Never, never, never attempt an update/upgrade on any portable computer device without plugging it into its AC charger.

Low Battery Warning and Screen Shut Off

A couple of months ago I stopped receiving the Low Battery/Reserve Power/Connect to AC warning. The computer would just shut down then. This is probably explained by my battery being on a 350 cycle count.
However, a new problem has arisen which I am not sure if it would be connected to the same issue. When running basic software (firefox, excel, etc) the computer works fine, but as soon as I attempt to run something more complex (Google Earth, iPhoto, sometimes iTunes) the screen goes black and becomes unresponsive. This happens whether I'm connected to AC Power or not. When I close the computer, the LED light at the front comes on steadily (not pulsating). I don't think the computer shuts down as the battery seems to continue to run down. The only thing I have been able to do is shut the computer down by holding the power button down.
I have tried taking out the battery and holding the power button for 10 seconds/tone as well as holding the power button (with the battery in) for 5 seconds/tone.
While I am fairly sure I'll need to get a new battery, I'm not sure if that will solve the second problem as well. Any thoughts?
Thanks.

I'm going out on a limb here....
First, have you run Disk Utility to fix permissions, etc?
Secondly, do you only have issues when you run CPU intensive applications? If so, there are two things I can think of off hand. 1 is that maybe your CPU heatsink is coming loose. The other is, I seem to recall reading somewhere that if the CPU is pulling pretty close to 100%, it may pull extra power from the battery... maybe your battery being so low can not supply the needed power? Again.. this is just out in a limb, I don't know this to be fact.

HT1446 no low battery warning

I replaced the battery in my MBP which wouldn't charge or run for more than 1 hour. Now, with the new battery, I have 2 issues:
1--battery status in menu bar does not change. It shows it's at 28% all the time
2--I not longer get a warning that my battery is about to run out.
Any fixes??? This is a drag since the computer keeps going to sleep on me because it's run out of juice unbeknownst to me. Thanks.

Hi Carolyn. Thanks so much for your help. I followed your instructions and managed to get it to show me the percentage of juice in the menu bar but I still don't seem to be able to set it to show me time remaining instead of percentages. Any thoughts on that? Again, thanks so much.

Low battery warning - not working

I used to get a low battery warning before my MacBookPro would automatically shut down. Now, all of a sudden I no longer get the warning pop-up message and the computer just suddenly shuts down when the battery is low. Any ideas?
Thanks,
Scott

Yeah, it's happening to all of us on 10.4.10. Good news is it goes into hibernate (disk suspend) rather than just dieing. There is a setting to turn on a warning, but I forgot where. Surprisingly, it is not in Power.

Abrupt loss of power, no low battery warning

a familiar story, but haven't been able to dig up a solid solution in past discussions--so perhaps a fresh suggestion...? (thanks in advance!)
okay, so one moment the battery indicator shows 45 minutes remaining; the next, my tibook puts itself to sleep or shuts down entirely. and when i plug it back in--yep, the battery indicator shows a 0% charge.
this is actually my 2nd battery for this tibook, a replacement i purchased from apple after the 1st died as expected. for the life of that 1st battery, i would always see a low battery warning before shut-down, and the charge indicator generally was on target. but as for the current battery, even though it's relatively new (maybe just over a year old, 193 cycles) and still holds a decent charge (lasts a couple of hours), i can't even recall the last time i saw that warning message before the computer went dark on me. i tend to stay plugged in, but when running on battery power the charge indicator seems pretty accurate--unless i dare to get anywhere near depletion as described above, and then suddenly it's way off the mark and the screen is dark.
i've tried messing with power settings, follow tips for maintaining battery life, etc.--no luck. surely the battery can't be dead already!
...though that would figure since i can't return it anymore... and since my extended applecare plan expired a week ago, maybe now my (replacement) adapter will explode and almost burn the house down like the 1st one did. sheesh.
anyways, big-time thanks for any insight or suggestions, much appreciated.
PowerBook G4 (ti) Mac OS X (10.3.9)

maybe the power mangement unit on your logic board is broken?
The more people experience the same symptoms, the more I doubt it.
did you do all the resets pram etc?
Yes, of course. To no effect.
While I am trying the "trick" described above by SuperSizeIt (discharge until forced sleep + sleep for another whole day + recharge to maximum), please: everybody go to SystemProfiler and check their capacity. Is it going down from charge cycle to charge cycle, as in my case?
Initially I had: 4200 mAh
After just six cycles in three weeks: 3176 mAh
So the drop is more than ~170 mAh/cycle. I would consider a few mAh normal, but certainly not this much!
Now, I would like to know whether this symptom is just part of the problem described in this thread, or an additional one.
Powerbook G4 400 Mhz Mac OS X (10.4.4)

MacBook shuts down after low battery warning

Hi,
up until recently my macbook's battery has been working just fine. but then lately i noticed that a few minutes after it displays the low battery warning it shuts down by itself.
before, when the low battery warning would display i could still continue working on my macbook for several minutes until it goes to sleep -- only then would i connect it to the power cord.
unlike the other posts (concerning batteries) that i've read, i have no problems turning my macbook on/off before or after this event has occured. neither does it shut itself down when the battery is halfway. my problem really only happens after the low battery warning has been displayed.
i wanted to calibrate my battery but then that would require my macbook to go to sleep once it reaches a battery level of less than 5%-10% -- mine just shuts down completely.
is this shutting down thing a substitution mechanism to save the laptop's memory -- instead of going to sleep, it'd just shut down?? how can i fix this?
thanks in advance for the help.
MacBook Mac OS X (10.4.8) 512MB, 2GHz Intel Core Duo

For what it is worth, I now have the same issue. Only I don't even see the low battery warning, it gets to 15% or 10% and bang, no power. This is not good, by the way and is bound to corrupt something in the system as OSX requires some house keeping when you shut down the computer properly. This instant off is not a proper shut down. I took my MacBook in and they wouldnt simply replace the battery, they want to keep the computer and give it back to me in a few days. I rely on this puter for work 5 days a week, so I was trying to avoid this.
Oh well I guess a trip to the Apple store is unavoidable.
Regards,
RacerX

Shut down after low battery warning

Hi
After I get the low battery warning on my iBook G4 (about 30 seconds) my iBook unexpectedly shuts down, I have tried recalibrating the battery several times, including shutting the lid to put it to sleep after the warning then plugging it in and waking it (to recalibrate you are supposed to wait until the machine sleeps) and letting it charge right up.
I have also tried resetting the PMU, although I dont think this is working as I hit shift-ctrl-apple/option-and the power button, and all that happens is the machine starts up as usual, according to the documentation, I should have to then power up the machine.
Is itr just that my battery hasd had it? I have notice it only takes an hour/hour and a half to run the battery down, and only about 30mins or so to charge.
Thanks for any help in advance.
Mike

That definitely sounds like a battery that wants to be replaced.
My iBook behaved in a similar manner--except the "low battery" warning wouldn't even show up!
I think it's time for you to pick up a new battery--they run about $100.
~Lyssa

No low battery warning, just shuts off

I have an Core Due Macbook back from September 06, and recently I've stopped getting that low battery warning message. Now my laptop will just shut off at 20min (sometimes even 30min) without any warning. I tried recalibrating the battery, it solved the problem for one charge (I saw the warning message once) but after that it went back to shutting off at 20min again. I've heard that Apple has extended their battery coverage, but my laptop is at 315 cycles now. I do have the extended warranty though-will that cover a replacement battery?

Hi. Recalibrating the battery does not prolong battery life. It will only help in getting a more accurate battery charge when using the computer on battery power alone. What you can do is make sure that you have the battery update and latest software from apple. Also, try resetting the SMC of your computer. Here are the links for more info. Hope these help.
http://docs.info.apple.com/article.html?artnum=303319
http://www.apple.com/support/macbook_macbookpro/batteryupdate/

No low battery warning and shut down

My MacBook is no longer showing the "low battery" warning and even with the batery status showing charge suddenly shuts down. If I check manually pressing the button of the bettery flashes 2 or 3 lights.
I have calibrated the battery several times but i am having problems doing it again because after the shut down there is still charge in the battery.
I have OS X 10.5.8 and all the software updates done.
Thanks.
Dan

Same Problem is happening to me. I have a Late 2008 13" Aluminum Macbook. If some one knows what to do please post. Thank you
Información de la batería:
Información sobre el modelo:
Número de serie: 9G84703BA3NYB
Fabricante: DP
Nombre del dispositivo: bq20z951
Pack Lot Code: 0000
PCB Lot Code: 0000
Versión del firmware: 002a
Revisión de hardware: 0005
Revisión de celda: 0100
Información sobre la carga:
Carga restante (mAh): 1223
Totalmente cargada: No
Cargando: Sí
Capacidad de plena carga (mAh): 3285
Información sobre el estado:
Número de ciclos: 182
Condición: Normal
Batería instalada: Sí
Amperaje (mA): 1253
Voltaje (mV): 11966
Ajustes de alimentación del sistema:
Alimentación de CA:
Temporizador de reposo del sistema (en minutos): 180
Temporizador de reposo del disco (en minutos): 10
Mostrar temporizador de reposo (en minutos): 20
Reinicio automático en caso de corte de alimentación: No
Activar al cambiar el modo de alimentación: No
Activar al abrir la pantalla: Sí
Activar al acceder a la red local: No
Fuente de alimentación actual: Sí
El reposo de la pantalla utiliza atenuación: Sí
Carga de la batería:
Temporizador de reposo del sistema (en minutos): 15
Temporizador de reposo del disco (en minutos): 10
Mostrar temporizador de reposo (en minutos): 5
Activar al cambiar el modo de alimentación: No
Activar al abrir la pantalla: Sí
El reposo de la pantalla utiliza atenuación: Sí
Reducir brillo: Sí
Configuración del hardware:
SAI instalado: No
Información del cargador CA:
Conectado: Sí
ID: 0x0100
Potencia eléctrica (W): 60
Revisión: 0x0000
Familia: 0x00ba
Número de serie: 0x00cd1692
Cargando: Sí
Message was edited by: Alfonso Sánchez

No "Low Battery" Warning - Sudden shut down

Hi everyone.
It took me sometime to realize this problem, but my MBP reaches the 30% battery level and suddenly shuts down (point blank)..quite disturbing. I've looked around in the forum but there's no precise answer of what to do to solve this. Any suggestions? Thanks in advance!
Battery Information:
Model Information:
Manufacturer: Sony
Device name: ASMB012
Pack Lot Code: 0000
PCB Lot Code: 0000
Firmware Version: 0110
Hardware Revision: 0500
Cell Revision: 0303
Charge Information:
Charge remaining (mAh): 4781
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 4864
Health Information:
Cycle count: 97
Condition: Normal
Battery Installed: Yes
Amperage (mA): -16
Voltage (mV): 12369

Model Information:
Serial Number: SMP-ASMB012-362b-755
Manufacturer: SMP
Device name: ASMB012
Pack Lot Code: 0001
PCB Lot Code: 0000
Firmware Version: 0102
Hardware Revision: 0300
Cell Revision: 0200
Charge Information:
Charge remaining (mAh): 0
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 110
Health Information:
Cycle count: 358
Condition: Good
Battery Installed: Yes
Amperage (mA): 365
Voltage (mV): 12620
Forgot to paste my computer information. I'm pretty perplexed because it says that my battery condition is still "good". However, it has gone through 358 cycles...does this indicate a need for a batter replacement despite that the condition is still good?

Low battery warning comes on too late?

Hey guys. I've been having this problem where the computer shuts down like 20 seconds after the reserve battery power warning. I literally dig into my backpack for it as soon as the warning pops up, and then as I'm plugging it in, it shuts off. The point of having the warning is to give me enough time to plug it in. Is there a way to change when the warning comes on? Say, at 15% instead of 7%? And isn't it supposed to go to sleep, not shut down? Because mine is completely shutting down less than half a minute after the low battery warning.
I'm running a 2008 Macbook Pro and have a brand spanking new battery and battery charger that I bought from the apple store about 2 weeks ago. I remember the low battery warning used to come on at around 9% when I first got it, and then it would still run a good 15 minutes after that before going to sleep.
Also, I am running it on higher performance, not better battery life. Oh and I'm still on Snow Leopard. Let me know if you need any other information. Thanks in advance.

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.

No "low battery" warning anymore

I have a Macbook Pro and noticed lately that it never gives me that "low battery" warning any longer. Rather, it just completely shuts down when it runs out of juice. Oftentimes I am sitting in front of the tv and surfing the web and while I realize it's running low, it'll just shut off. In the past - and I admit I mostly use my Mac plugged in at my desk - I'd always get that warning. Why is that and how can I get the warning back? At least it would give me ample time to get it plugged in before shutdown. Thanks.

The full charge capacity of the battery actually looks pretty good for 3 to 4 years old if this is a 15" MBP, Bluesygirl. (If it is a 17" then it is not so positive)
The problem with the cycle count is actually that it is way too LOW if the battery is this age. Lithium batteries actually need to be regularly used to maintain their condition. (see http://www.apple.com/batteries/notebooks.html and http://discussions.apple.com/thread.jspa?threadID=1764220 for good advice on maximising battery life). A battery that had been used in a fashion likely to maximise battery life would probably have completed at least 100 to 150 cycles by now at that age.
The age of the battery (if it is the same as the computer) also counts against it. The "real world" life expectancy of the batteries fitted in the 2006 to 2008 generally seems to be about two to three years.
Given the comparatively good full charge capacity that System Profiler identifies it is worth doing two things. Firstly you should try to recalibrate it following the instructions in the link in my previous post. THis will give a better idea of whether the battery really does have the capacity claimed. Secondly you should take it to an Apple store or AASP to get tested. Sometimes even though batteries maintain a fairly high voltage level / total capacity they lose the ability to meet sudden high current demand situations.
You might also consider resetting your SMC ( see http://support.apple.com/kb/HT3964 ), but I think it would be wise to do the calibration and get the battery tested first, given the symptoms you describe.
Cheers
Rod

Macbook no longer "sleeps" after 'low battery' warning, just suddenly dies

My macbook (just over a year old) used to give me a warning with 10 minutes left that it would sleep so as my data was not lost, if I didn't plug it in. However, recently, it has stopped doing this - instead of sleeping, if I don't get to a power source in time within 10 minutes, it simply cuts out, with the sound of the hard drive stopping - like if you shut down a frozen macbook with the power button.
This is REALLY irritating - what's going on? Why does it not sleep anymore, and is there any way to fix it?
I'm on Tiger 10.4.11, with an intel macbook...

Same Problem here. Tried several calibrations, smc and pram zap (well i guess there is no pram any longer so it zaps something else). Now I found another post where they talk about the battry 1.2 update. http://discussions.apple.com/thread.jspa?threadID=1449128&tstart=60
I remember when trying to do an battery update to 1.3 manually the update told me that it is not for my macbook. But - I found the 1.3 update Bundle in /System/Library/Configuration/BatteryUpdater.bundle
1. I Removed /System/Library/Configuration/BatteryUpdater.bundle from my system
2. rebooted
3. Emptied trash
4. Installed update 1.2 by Softwarupdate.
I will now do an SMC reset an then let the battery run low and watch what happens.
Then do a calibration.
I have the problem here in different ways. Sometimes Macbook shuts down suddenly after low battery warning, sometimes it sleep, almost never it hibernates.
My Battery was replace after showing the x symptome about a year ago but now it looks bad again
Full Capacity (in mAh): 3866
Remaining Capacity (in mAh): 1982
Power Consumtion (in mA): 1564
Voltage (in mV): 11974
Number of cycles: 148

No "Low Battery" warning on new (November 07) MacBook - Kernel Panic

Hello,
I'm not sure is this is the right forum for this, but since the problem occurs during a specific battery state, I'm going to post it here.
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!

I'm a little hesitant to force a firmware update on a MacBook it wasn't meant for. These are brand new models, and I would think Apple didn't ship them with the known faulty batteries or bad firmware.
The frustrating thing is I have no way of knowing who the culprit is. Is it the brand new OS that I'm sure has a fair share of bugs? Is it the new hardware having a power control issue? Or is it a combination of Leopard and the new hardware? I was hoping to find some users who had the same problem so I could narrow it down. Battery drains out, kernel panic, then the machine shuts off after a few seconds. Funny thing is, the indicator says I have like 10 minutes or so left, but it appears that the battery must be completely dead, since it forces a panic and the machine just dies. So it might be a calibration error. The Mac thinks it has some juice, but in reality it's just about dead.
I made an appointment for the Apple store tomorrow, so we'll see what they have to say. It's otherwise running beautifully, thankfully.

HT1446 No low battery warning before it shuts-down

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