Low Battery warning went away?!

HELP!! For some reason, my MacBookPro 17" stopped giving me low battery warnings. It always used to, but now it just shuts off without warning. I've read through the other discussions for tips and here is what I have done so far: I've re-calibrated the battery, reset the PMU, zapped the PRAM, run all software updates, and run disk utilities. So far, nothing has helped. It used to get down to roughly 6-12% battery life showing and the icon would change from black to red and it would beep and flash and tell me that I am running on reserve power. Now, the icon is still showing as black and then the computer just shuts off when it is still reading around 30% charged. I don't know what else to do, but this is extremely frustrating. This machine is less than a year old. Please help!

Ladies and gentlemen,
This is my THIRD battery on a 15" MBP 1 year old. It is again shutting down at 50%. My first issue was that the battery would lose its charge very quickly and then go to sleep. My second battery started shutting the MBP down with 50% and would not boot up unless the power supply was connected. Does Apple have any answers to this? I have been speaking to my Apple dealer and they will have to test the MBP to try and figure out what's going on. I have also changed my AC adapter once because the led would turn off in moved slightly. Now this new AC has a few kinks on the cable around the connector. I am tending to think that if you twist it too many times it may get some wires crossed, I don't know. I getting very frustrated. I am teacher and I am constantly using this machine all around the school; a PC based school. I'm not giving a good name to Apple.

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Low battery warning percent fixed??

I have Vaio VPCYB15AG with Win 7 Ultimate SP1 32Bit retail. In it's advanced power options even though I can set percentage value for Low battery warning, I find that the warning is given (Blinking green power LED) when battery falls to 12%.Is this level kind of hard wired into the product or will it be a software / hardware bug?Thanks

Hi mmp_2013,
Thank you for considering Sony Community!
If the LED or the light indicator is blinking, then something is going on with the battery. It could be hardware but we cannot tell right away. Please follow the steps here to isolate your issue:
Check the battery health on Vaio Care (Desktop) - If indicated as "critical" then it already hardware issue
Power cycle - Remove the battery and all peripherals -> press and hold the power button for 5 seconds OR, if the battery is not removable, remove all peripherals-> look for a battery off button on the bottom of the laptop -> push the button for 5 seconds -> you may use a safety pin if you see a pinhole.
Reset BIOS - Turn off the unit -> press and power button and immediately, keep hitting F2 key. Once in BIOS, go to Exit tab -> Get Default Values -> hit Enter -> Save changes and exit.
Download or update Sony® Shared Library, Sony® Firmware Extension Parser Device Driver, BIOS Update Utility from Sony's website based on your location or from where you purchase the laptop.
Your Vaio VPCYB15AG is an Asia-Pacific model and we have limited information about your unit.
For further assistance regarding your concern, please contact the Sony offices/Sony representative offices nearest to your place of residence in Asia Pacific region http://www.sony-asia.com/countryselector.html?hpid=countryselector:AsiaPacific. Due to proximity, they are in a better position to respond to your questions or concerns.
Hope these help.
Regards,
Vincent
If my post answers your question, please mark it as "Accept as Solution"

Low battery warning not appearing at 20% of charge left...

When the low battery warning dialog should come in?

My warning went off like at 5%, it said something that I was running in reserve battery.

Strange low battery warning...

Evening all.
I recently bought a new Nike+ sensor for my touch as the battery died in the old one.
I successfully paired the sensor with my touch but when I started the app the low battery warning still showed up! thinking this was wrong, given it was a new sensor, I went for a quick jog, calibrated it and continued jogging. when I had finished it said I had done 0 miles!?!
Now thinking it was a duff sensor I took it back to the shop and got a new one. paired it again and the low battery still comes up!!
Could this be a software problem? I have paired it several times and the warning still comes up and after a jog it records a distance of 0 miles
Anyone have any ideas??
Thanks,
Andrew

When I took the above stats, I had recharged the battery just onced. Now I've gotten up to two recharges. I think you are correct, it takes a few cycles to stabilize. Thx for the comment.

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)

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/

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 Macbook Pro (Mid 2012)

Hello!
I just purchased my macbook pro this saturday and it's my first mac. I've noticed that I do not receive a low battery warning at all. What can I do about this?

Thanks for the battery info, but the steps for calibrating the battery don't apply to current laptop models.
>>
Portables with built-in batteries
Current Apple portable computer batteries are pre-calibrated and do not require the calibration procedure outlined in this article.

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.

What can I use for a low battery warning on a Mac Book OSX10.8?

What can I use for a low battery warning on a Mac Book OSX10.8?

What you should see above all your windows when your battery gets to low.

I just got a "low battery warning" on my iMac... What is that all about???

Just got a low battery warning on my screen. What does it mean? What do I have to do to correct this? Could this be why it seems to take so long for pages to refresh/display; why the screen seems to frequently freeze and why I frequently see that spinning rainbow wheel?

Your pram battery probably needs renewing.
You can check which one you need here:
http://support.apple.com/kb/HT2295?viewlocale=en_US

Leopard's Low Battery Warning on iBook

Hey everyone,
I recently upgraded my iBook G4 to Leopard. Everything works fine until I run the battery down low. When the low battery warning pops up, it either causes a spinning pinwheel or just appears as a white rectangle with a shadow. Then, after slowing down my Mac for a few seconds, the warning window disappears and the airport and battery icons in my menu bar disappear. A few seconds more, and warning and the icons reappear. The only way for me to stop this cycle is to plug in the adapter.
Help!
Matt

Turns out I was having more problems than just the indicator... after replacing my power adapter everything worked fine.

E63 Low battery warning tone

It seems that I am not getting low battery warning from my phone. Please advise how to set it up. It is an E63 phone. Thanks

Within profiles, have you set warningtones off?

N97 Low Battery Warning

Is there a way to manually discharge the battery on an N97? Or alter the time between getting the first low battery warning and complete battery discharge?
From the first time I get the warning to actual discharge takes ages.Yes that can be a good thing but if, like me, you prefer to let the battery completely discharge it can be like waiting for Christmas.
I know I can use the music player, camera, video etc to help discharge the battery. But is there a more specific and faster way?

You should not let the battery discharge completely. It can damage the battery. The battery prefere to have as much juice as possible on it all the time. Once a month you could discharge it to like 10-20 percent.

Low Battery warning at 90%

I have a G4 ibook, that didn't get used for a long time, (over a year) and I am using again after my newer laptop was stolen. The battery may be near the end of it's life, but I am confused by getting a "low battery warning" dialog box, when the battery indicator says 90%.
If it was just dropping quickly I'd assume the battery was toast, but I don't get the conflict between the two pieces of information.
Is there any point in resetting the PMU? Should I just consider this a not-so-portable until I replace it?

Have you tried calibrating the battery?
Calibrating your computer's battery for best performance
If that doesn't help, resetting the PMU may not help, but it wouldn't hurt.

Low Battery warning went away?!

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