My MBP doesn't give any low battery warning...

it just shuts down, like somebody pulled the plug. On my old laptop a warning would appear and if you ignored it long enough the computer would go to sleep. Nothing like that on Lion? It's really drag.

Here are my battery stats:
Charge Information:
Charge Remaining (mAh):          5353
Fully Charged:          Yes
Charging:          No
Full Charge Capacity (mAh):          5378
Health Information:
Cycle Count:          184
Condition:          Normal
Battery Installed:          Yes
Amperage (mA):          -1045
Voltage (mV):          12324

Similar Messages

Sleep without low battery warning

Hey all,
My MBP 17" - 3weeks old- has twice in the past 48 hours gone to sleep straight without any low battery warning. It has made numerous beeps while just going to sleep but wakes normally.
Suggestions?

If you haven't already, make sure to calibrate the battery, following the exact instructions in the manual or on Apple's article on calibrating the battery. (Make sure to scroll to the bottom for the MacBook Pro instructions.)

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

HP probook 6450b running windows 8 display port to HDMI doesn't give any output

Hi,
My laptop HP probook 6450b running windows 8, display port to HDMI doesn't give any output. I gave windows+P and tried selecting duplicate/extend but no output. I even tried to change the DP to HDMI converter and the HDMI cable as well but no luck. Any help would be much appreciated.

Dear Customer,
Welcome and Thank you for posting your query on HP Support Forum
It looks like you are using the Display Port on the Notebook get HDMI Ouput for better Audio and Video
We will surely assist you with this issue
Firstly I would like to keep you informed that the Display Port supports resolutions up to 2560 x 1600, 30-bit color depth at 60 Hz, and full HD (1920 x 1080) monitors, 24-bit color depth at 120 Hz
NOTE: Resolutions are dependent upon monitor capability, and resolution and color depth settings.
Please use an HP DisplayPort to HDMI Adapter for this setup. Please make sure that you are using HP Cable/Converter with the Product Number BP937AA.
1. Please let me know if you have additional graphics card installed on your Notebook
2. You can try download and installing the latest BIOS Update for your Notebook from the HP Website
3. Make sure VGA Port on the Notebook is not in use when you are testing the Display Port
Hope this helps, for any further queries reply to the post and feel free to join us again
**Click the KUDOS star on left to say Thanks**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.
Thank You,
K N R K
Although I am an HP employee, I am speaking for myself and not for HP

Low Battery Warning doesn't appear

I used to get the warning.
I searched for it, and don't see an option to have it appear.
Not a huge issue, just that it was a handy warning.
Thanks'

It may help to train the charge and run time estimation (which the low battery warning depends on) if you run your PowerBook's battery down from 100% to 0% nonstop and then recharge it to 100% once or twice. If that does not help, try [resetting the power manager|http://support.apple.com/kb/HT1431?viewlocale=en_US].

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

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 when battery full

This only happened to me this one time, but I have my iphone plugged in and the battery icon says it is fully charged, but I received a "low battery" warning.
Any thoughts as to why this may have happened?
Thanks!

What version of firmware are you on? There were battery gauge problems in 3.1.2 that 3.1.3 is supposed to fix. Meanwhile, you can try running the battery down until the phone shuts off, then plug in to the wall charger for 4 hours. Do this twice. if it still doesn't work right you may have a bad battery; take it to Apple.

Low battery warning prompts

I got the 20% low battery warning after a standby of 59 hours and usage of 5 3/4 hours. I was browsing the web through Edge when I got the 20% warning. Less than 2 minutes later, the 15% warning showed up. I continued to browse the web for more than 5 minutes and didn't receive anymore warning. At that point I decided to charge the phone. How did I lose 5% of battery power from 20% to 15% in less than couple minutes? Does this happen to anyone? Dropping 5% in less than 2 minutes doesn't make any sense.

I was able to use my iPhone to listen to music for about an hour between the time it said 15% and from the time it just shut off. It probably just depends on what you are doing on the phone. 59 hours is a very long time on standby and it's possible that your battery reading wasn't accurate at that point.

[SOLVED] Low battery warning form acpi

Hello!
I hope you could help me out, as I am stuck.
I am trying to automate pm-utils stuff on my laptop, that I have until now been doing by hand with CLI. I installed acpid and I really like how it works as it is very easy and clean to add event handling for closing laptop lid etc.
But I was unable to use /etc/acpi/handler.sh to detect low battery warning. Only event that is received under "battery" is when the AC adapter is plugged in or battery is removed/inserted, but not when battery is low.
I tried to find more info on this, but discovered only that it is supposedly possible to configure alarm level in /proc/acpi/battery/BAT1/alarm, but that file seams to be depreciated and it's replacement (?) /sys/class/power_supply/BAT1/alarm contains a number resulting in about 3% charge, that should have been sufficient for at least writing to log file if any event was received from the battery, but nothing was. (And anyway, I don't know how to configure it using this file, as I am not allowed to write to it and it gets overwriten by something.)
So I could really use some pointers on why the acpi event for low battery doesn't get generated (or why I am missing it) or what alternatives I have.
I really would not like to run a cron job for checking battery level, as the acpi event method seams much more beautiful to me and would allow me to sleep better.
Thanks a lot!
Last edited by beatle (2012-01-06 01:20:29)

/dev/zero wrote:No worries :-) If you can think of any ways to improve the script, I'd be interested to know. It isn't perfect because output from "acpi -b" is unpredictable.
I did adapt your script a bit to suite my needs (Thanks for showing how to write deamon scripts! I haven't thought that it is so straightforward and beauty full.) , but I wouldn't say I improved it as I am basically illiterate in bash.
For now I deal with the output of "acbi -b" by searching for the "NN%" (with grep, as I know not of a better way) - remaining percent of battery charge - in it, as I suspect this sub string would allays appear in "acbi -b" output even when the 'remaining time' part is unpredictable (haven't checked it though!).
Also, my laptop is usually on mute so I changed the text-to-speech warning to a i3-nagbar popping up. (And along the way learned how to control spawned processes in bash! I love just GNU/Linux!).
/usr/sbin/battery_monitor_loop
#! /bin/bash
SLEEP_TIME=5 # Default time between checks.
SAFE_PERCENT=30 # Still safe at this level.
DANGER_PERCENT=15 # Warn when battery at this level.
CRITICAL_PERCENT=5 # Hibernate when battery at this level.
NAGBAR_PID=0
export DISPLAY=:0.0
function launchNagBar
i3-nagbar -m 'Battery low!' -b 'Hibernate!' 'pm-hibernate' >/dev/null 2>&1 &
NAGBAR_PID=$!
function killNagBar
if [[ $NAGBAR_PID -ne 0 ]]; then
ps -p $NAGBAR_PID | grep "i3-nagbar"
if [[ $? -eq 0 ]]; then
kill $NAGBAR_PID
fi
NAGBAR_PID=0
fi
while [ true ]; do
killNagBar
if [[ -n $(acpi -b | grep -i discharging) ]]; then
rem_bat=$(acpi -b | grep -Eo "[0-9]+%" | grep -Eo "[0-9]+")
if [[ $rem_bat -gt $SAFE_PERCENT ]]; then
SLEEP_TIME=10
else
SLEEP_TIME=5
if [[ $rem_bat -le $DANGER_PERCENT ]]; then
SLEEP_TIME=2
launchNagBar
fi
if [[ $rem_bat -le $CRITICAL_PERCENT ]]; then
SLEEP_TIME=1
pm-hibernate
fi
fi
else
SLEEP_TIME=10
fi
sleep ${SLEEP_TIME}m
done
Hm, and just now I got an idea, that, in order to avoid the unpredictable "acpi -b" I could use the acpi information form /sys/class/power_supply/BAT1/* directly as I already have a deamon running. Will try that out.
Last edited by beatle (2012-01-06 18:17:41)

Where is low battery warning in Mountain Lion?

Lion used to give low battery power alerts which I do not find after Mountain lion upgrade. Is it still there or...???

Turbo toes
This helped meRe: Where is low battery warning in Mountain Lion?
Jul 29, 2012 8:51 AM (in response to Kallampad)
It kicks in at 3% on my 2011 MBA, I have seen reports that the % at which it appears can vary quite a lot, from 16% to 3%.
Speculation would be it depends on the fitnesss of the battery?
MrSlinky
Re: Where is low battery warning in Mountain Lion?
Aug 13, 2012 4:57 AM (in response to Turbo toes)
My rMBP's battery had fallen to 3% before I noticed it, and I never saw any popup warning. I was not running anything fullscreen (just firefox covering part of the screen).
Running your battery down to these very low charge levels will shorten its life, try to avoid discharging to less than 40%, try to stay on AC power as much as you can (all the time is better than your current useage profile) and only let it discharge when there is no other choice.

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 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.

Low battery warning for my iMac keyboard

I keep getting a low battery warning for my iMac keyboard even when it has brand new batteries. Is there a way to switch this off or reset it so that it doesn't keep informing me?

Hello! I also have this problem. My keyboard is brand new and so also the batteries. I have tried with different types of batteries but get the same warning. I also have tried to erase the device in the bluetooth settings and add it again. Nothing works. It is a pity because I like mac.

My MBP doesn't give any low battery warning...

Similar Messages

Maybe you are looking for