How to suppress low battery warning on iPhone

Hi,
I need to be able to suppress low battery warnings since they can mess up the way the app works. Is there any way to do this?
Also, if there is a way to calculate how full the battery is, that would be very interesting.
Thanks!

I'm pretty sure nobody would want you to do that.

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No 'Low-Battery' Warning on iPhone 4

Don't know whether to class this as a hardware, or software fault, however...
As the title says, I get no little blue rectangle warning at either 20% or 10%.
I have deliberately ran the battery down for the last 4 days in a row to (quadruple?) check on this to make sure that I wasn't a) going insane and b)make sure that I just didn't 'miss' it.
Today, I even ran the battery down to 18% (No warning pop-up), recharged to 22%, and let it drain again to 19%. (Still no pop-up)
Have also rebooted the phone multiple times to no effect.
Is anyone else having an issue like this?
Most importantly though..., Is there a fix?

My iPhone 4 alerts me when the battery is low.
Have you tried restoring the iPhone and setting up as a new iPhone or did you set the iPhone 4 up from a back up from an older iPhone?
I set mine up as a new iPhone.

How to get low battery warning on Satellite L350-235?

Hi
I have a Toshiba Satellite L350-235
I have a problem trying to get a warning sound when my battery is low.
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You can do this in personalize option of Win 7
Make a right click on desktop and select Personalize
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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.

How long should the battery in an iPhone 3GS last?

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Not pointing a finger but I upgraded my iMac to Lion and I had to update iPhone to 5.0 and that was when I started having problems.
What gives
Andy

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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?
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Low battery warning for low signal?

Every once and while I get the screen showing the battery at red and asking to plug the Iphone in. When I looked at the battery life it's still had more than 30%, but my signal was on like 1 bar, could this be a reason why the Iphone might show a low battery warning?

I've seen this before, and believe it's a Bug:

[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)

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

6500 Slide No Low Battery Warning Tone

Hi,
Does anybody know if the 6500 slide has a low battery warning tone function? If so how can I turn it on?
Thanks,
Cazzi74

06-Sep-2008 11:50 PM
cazzi74 wrote:
Thanks for the advice.
So it won't harm the battery to regularly charge it up when the battery level isn't at a low charge?
Yes. Ironically, modern batteries liked to be always charged - at least partially.
06-Sep-2008 11:50 PM
cazzi74 wrote:
I always thought it was best to charge it fully only when it's nearly empty?
That is applicable and advisable for old batteries - early Nokia batteries - and especially NiMH and NiCd's. But not for modern batteries at the present.
Also, can it do harm to charge for say 30 minutes and not until it's full?
No. It won't pose any harm. As I've said, modern batteries like to be charged partially.
Hope this helps
Cheers
Message Edited by nj15 on 07-Sep-2008 12:04 AM

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 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.

How to suppress low battery warning on iPhone

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