No low power warning

For a while now, my PB has stopped giving me the low battery warning. It will go to sleep with 12-21% battery life left. I let this happen maybe once a week or so. Any thoughts?
Geoff

Apple says that a properly maintained battery should have 80% capacity at 300 cycles (battery life is generally measured in cycles, not calendar time). If a system is plugged in most of the time, and not drained at least monthly, the power capacity would drop off quicker. Apple's note on battery maintenance is at http://www.apple.com/batteries/notebooks.html
As noted in the previous post, a battery that loses power suddenly is one sign that a lithium battery is approaching the end of it's life. You can always do a power management unit (PMU) reset to see if that affects anything, follow this Apple note: http://docs.info.apple.com/article.html?artnum=14449

Similar Messages

Low power warning for AIR-LAP1242AG-C-K9

Hi Buddie,
We purchased some AIR-LAP1242AG-C-K9 , but not perchasing any wireless controller. When I connect the LAP to Cat2950 or Cat2960 PPoE port, all the LAP can not boot normally. It indicates low power, please refer the two pictures attached. But if I use external power cable, the LAP can work well. So, I would like to know two things.
1. Can I use LAP standalone without using controller ?
2. If the above is Yes, how should I configure the PPoE on cat2950 to Support LAP correctly?
Thank you very much.

Hi Jian,
Q. Can an LAP operate independent of a wireless LAN controller (WLC)?
A. No, LAPs cannot function independent of WLCs. LAPs function in conjunction with a WLC only. The reason is that the WLC provides all the configuration parameters and firmware that the LAP needs in the registration process.
So you will need to either send the AP's back and get the IOS version, purchase a WLC or convert the LAP to IOS :(
Q. How do I distinguish between a regular (autonomous) AP and an LAP?
A. The easiest way to distinguish between a regular AP and a LAP is to look at the part number of the AP.
LAP (Lightweight AP Protocol [LWAPP])?Part numbers always begin with AIR-LAPXXXX.
Autonomous AP (Cisco IOS? Software)?Part numbers always begin with AIR-APXXXX.
From this good Q&A doc;
http://www.cisco.com/en/US/products/hw/wireless/ps430/products_qanda_item09186a00806a4da3.shtml
You can convert an access point from lightweight mode back to autonomous mode by loading a Cisco IOS Release that supports autonomous mode (Cisco IOS release 12.3(7)JA or earlier). If the access point is associated to a controller, you can use the controller to load the Cisco IOS release. If the access point is not associated to a controller, you can load the Cisco IOS release using TFTP.
Using a TFTP Server to Return to a Previous Release
Follow these steps to revert from LWAPP mode to autonomous mode by loading a Cisco IOS release using a TFTP server:
Step 1 The static IP address of the PC on which your TFTP server software runs should be between 10.0.0.2 and 10.0.0.30.
Step 2 Make sure that the PC contains the access point image file (such as c1200-k9w7-tar.122-15.JA.tar for a 1200 series access point) in the TFTP server folder and that the TFTP server is activated.
Step 3 Rename the access point image file in the TFTP server folder to c1200-k9w7-tar.default for a 1200 series access point, c1130-k9w7-tar.default for an 1130 series access point, and c1240-k9w7-tar.default for a 1240 series access point.
Step 4 Connect the PC to the access point using a Category 5 (CAT5) Ethernet cable.
Step 5 Disconnect power from the access point.
Step 6 Press and hold MODE while you reconnect power to the access point.
Step 7 Hold the MODE button until the status LED turns red (approximately 20 to 30 seconds) and then release.
Step 8 Wait until the access point reboots, as indicated by all LEDs turning green followed by the Status LED blinking green.
Step 9 After the access point reboots, reconfigure it using the GUI or the CLI.
From this doc;
http://www.cisco.com/en/US/products/hw/wireless/ps430/prod_technical_reference09186a00804fc3dc.html#wp161272
Hope this helps!
Rob

MacBookPro shuts down with no low power warning.

Once my battery drains to around 10%, my mac just completely shuts off, with no warning. In the past, I had received a warning.
I've reset the SMC several times. I've reset the PRAM/NVRAM several times. This has had no effect.
The shutdowns are occuring both with an Apple branded battery and with a 3rd party battery.
I've only recently noticed this problem, because for a long time I've been using my laptop more like a desktop, completely on battery. Once I went back to using it as a proper laptop, I began to experience these warningless shutdowns.
Any advice besides trying to reset the SMC and PRAM again and again?

I've fixed the problem and want to share my solution.
I suspected some corrupted system files, so I reinstalled Lion (command-R at start up followed by a large download). This was extremely easy over a T1 connection and resulted in the low battery warning messages reappearing. But the mac still unexpectedly shut down instead of sleeping when the battery got too low.
So, I did another SMC reset, figuring it might have an effect in conjunction with the newly installed Lion. It worked! I now see low battery warning messages (at around 6%) followed by sleep (at around 4%).
I hope this info might help someone else.

USB Lowe Power warning.

Does anyone else get the error message
+01/03/09 3:19:20 PM kernel USB Notification: The device "DataTraveler 2.0" @ 0xfd531000 cannot operate because there is not enough power available+
when they plug in a memory stick into the aluminum keyboard port?

Funny thing is it works with iMac. But on the other hand I found out the reason for this. If I unplug the 30'' Cinema display USB hub from the Mac Pro, the keyboard hub gets enough power, and everything works. So I guess Mac Pro can't provide enough power to 2 USB hubs (one in the display and one in the keyboard). And this is true no matter which USB port they are plugged in at the back (I have not tried the front port, since I don't want to use those for the keyboard).

USB low power message

G4 (MDD) running OS X 10.4.11 - Just got a Zoom H2 digital recorder - when I try to connect to USB (via powered hub) I get a low-power warning and no luck connecting (even with the H2 plugged in via A/C). It works fine when I plug directly into the USB port in the back of the computer. There are only 2 USB ports on my G4 - my hub is in one USB port (has my printer and a couple of flash drives in it), and the other onboard port is for my keyboard. This does not seem to be a USB version issue, but rather an available-power issue (?) Can anyone please suggest a solution - do I need to add a USB card (PCI), and if so, what can you recommend for my system? Thanks in advance!!

Your Mac's USB ports are USB 1.1. Even if you didn't get the low power message, the video transfer would be very slow.
Suggest you install a USB 2.0 PCI card. See USB 2.0 PCI Cards
http://www.jcsenterprises.com/Japamacs_Page/Blog/B8B574BC-BB45-4B3E-9D9B-F97EBB3 230BC.html
Best bet is any card with a NEC PD720100 or PD720101 chipset Stick with the NEC chip, and try NOT to use drivers, Tiger and Leopard don’t need drivers.
All of these Cards are NEC chipset based
Adaptec 3100LP
BAFO BF-460
Belkin F5U220
GWC UC-160
IOGear GIC250U & GIC251U
Keyspan U2PCI-5
O'toLink U2-C2A, U2-C2B, U2-P20N & U2-P50
Ratoc PCIU5
USBWholesale UII-PCIP
I use an IOGear GIC251U in my G4 & have had no problems.
 Cheers, Tom

USB Low power?

I have a few USB devices - some USB 1.1, some 2.0.
To support my device habit, I picked up a powered USB2 hub - I figured that would be enough, even for me.
For some annoying reason, however, when I plug something that needs the faintest, little bit of power into it, I get the USB Low Power warning - which renders it quite useless to me.
Example - the cradle for my Palm Pilot is fine, and works well - but my wacom tablet or my USB2 CF card reader - both of which have a little LED on them, generate the warning.
I know the hub is getting power - simply by seeing the little lights go out when I unplug it from the mains.
Devices plugged directly into the powerbook are fine - but 2 ports isn't enough.
I get the same result with a different powered hub (my old 4 port hub).
Anyone got any suggestions?

Hi Brad
You were overloading the keyboard bus, and should only connect one devices at a time to the keyboard.
If you are running short of usb ports here's a great little hub with a port on top for flashdrives.
Belkin 4 Port Hub
Dennis

Error: PORT-4-IF_SFP_WARNING: Interface fcx/yy, Low Rx Power Warning cleared

Hello All
Error: PORT-4-IF_SFP_WARNING: Interface fcx/yy, Low Rx Power Warning cleared
%PORT-4-IF_SFP_WARNING: Interface fcx/yy, Low Rx Power Warning cleared Fab1 ISL
%PORT-3-IF_SFP_ALARM: Interface fcx/yy, Low Rx Power Alarm cleared Fab1 ISL
The above error is seen on ISL ports connected via DWDM device
Site-1
*************** Port Config Link Events Log ***************
Time                            PortNo        Speed Event Reason
Feb 7 04:16:57 2014 00263554 fcx/yy          1G     UP    Not FL
Feb 7 04:12:57 2014 00476583 fcx/yy          ---   DOWN   NOS Rcvd
Feb 7 04:05:05 2014 00539997 fcx/yy          1G     UP    Not FL
Feb 7 04:04:48 2014 00658474 fcx/yy          ---   DOWN   Loss Of Signal
Feb 7 04:04:37 2014 00734814 fcx/yy          1G     LR    Success
Feb 7 04:04:36 2014 00698779 fcx/yy         1G     UP    Not FL
Feb 7 04:04:33 2014 00291530 fcx/yy          ---   DOWN   Loss Of Signal
Feb 6 22:10:00 2014 00802873 fcx/yy         1G     UP    Not FL
Site-2
*************** Port Config Link Events Log ***************
Time                            PortNo        Speed Event Reason
Feb 7 04:28:01 2014 00904426 fcx/yy         1G     LR    Success
Feb 7 04:28:00 2014 00773733 fcx/yy          1G     UP    Not FL
Feb 7 04:24:00 2014 00982641 fcx/yy         ---   DOWN   Loss Of Sync
Feb 7 04:16:10 2014 00166069 fcx/yy          1G     LR    Success
Feb 7 04:16:09 2014 00041460 fcx/yy          1G     UP    Not FL
Feb 7 04:15:52 2014 00161505 fcx/yy          ---   DOWN   NOS Rcvd
Feb 7 04:15:40 2014 00199865 fcx/yy          1G     UP    Not FL
Feb 7 04:15:34 2014 00621376 fcx/yy          ---   DOWN   NOS Rcvd
Feb 6 22:21:05 2014 00220018 fcx/yy         1G     LR    Success
Feb 6 22:21:04 2014 00088178 fcx/yy          1G     UP    Not FL
Feb 6 22:21:02 2014 00914031 fcx/yy         ---   DOWN   NOS Rcvd
Also do we have any doc which explains port-config link events
Please advise

- What kind of SFP's ? colored ? or short wave ? 1G FC ?
- what kind of WDM system ? DWDM, CWDM ?
- what is the distance between the 2 sites ?
- it seems that the received signal is too weak, the link is flapping !

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.

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 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.

Low ink warning on C6380

While printing I get a low ink warning after printing only 30 pages with a new (color) cartridge. The printer keeps working fine, but I have to monitor each sheet to insure that I still have ink. How do I know if I'm really out?
--Bob

I have noticed a trend among brand printer makers to supply underfilled ink cartridges and laser toner cartridges with new printers. However, all the big brand name printers like HP, Epson, Canon, that I've seen inform buyers that the cartridges are underfilled. Unfortunately, they rarely use that precise language. Their marketing departments like to use page numbers.
A rigorous study conducted by Center for Science in the Public Interest (a Ralph Nader consumer organization) discovered that software low and out of ink warnings warn users they are out of ink when they have 25% to as much as 50% left. Some shut down printing! This is a good reason to never buy a printer just because its on special or low priced. Always go online with the model name and number and get user reviews first. That "does everything" cute Lexmark for just $49 may cost a fortune in ink Cartridges. Or, that nice $200 color laser printer may come with half filled toner cartridges and even factory refilled toners turn out to cost $129 each. A color laser printer takes 4 toner cartridges!
Color and black page counts are ALWAYS marketing department exaggerations.
How do you know when you are out of ink? The way PC power users always have. You never suddenly go empty. When your print declines in quality, you are very low on ink.
When the software says you are low, remove the cartridge, turn it upside down a few minutes so the remaining ink can get the sensor wet and reinstall it. You only need to do this with printer models (which I will not buy in the first place) with software-hardware setups that shut down printing when it "thinks" ink is low. Most printers only warn. If you can still print, just ignore the warnings.
Laser Printers. When print quality declines: Remove the toners and slowly tilt each one sharply to the left and right. Reinstall toners.
I strongly recommend refilling ink cartridges, especially black ones. The first time or two will take much more time than afterward. For absolute beginners I recommend Automatic Refill Systems. You get about 5 complete refills per system.
I do not use Auto Refill systems for black cartridges, which take only one color but I prefer them for tricolor.
It costs me 60cents to refill my HP black cartridges. Compare that to $27 for a remanufactured black cartridge, or $22 for store refill service. My tri-color cartridges cost me about $3 to refill as I use an Auto Refill System.
Most people get about 3 refills per cartridge, that is 3 refills before they must buy a new OEM cartridge. I get as many as 25 refills. How? Simple. I refill before I need to. I never wait until I get declining print quality.
I just guess when a cartridge is low enough to take some ink and I top off the cartridge. Visit the Stratitech site for detailed instructions in how to refill any ink cartridges. They even have free step-by-step video instructions for each cartridge! Their refill ink is the best. Major corporations buy refill ink by the barrel from Stratitech.
The two things you must attend to: Do not inject too much ink, intentionally inject not enough to totally fill a cartridge. Injecting too much can be messy. Make sure you inject the correct color in each tri-color cartridge partition & do not get colors mixed in your syringe.
--J
"I never let schooling interfere with my education" --Mark Twain

DJ 940c: Installed 78XL Cartridge, it works; printer cartridge light off; Toolbox Low Ink warning on

This is a real workhorse printer and I love it. And looking at this forum, many people feel the same way for everyday color printing. But, on Wednesday, 7/7, I bought a bew HP tri-color cartridge because the old cartridge had run out of yellow ink (for real), the printers's cartridge light was staying on and the HP DeskJet 940c Series Toolbox program had a "Tri-Color Print Cartridge Low On Ink" warning in my Win XP SP3 System Tray. The office supply chain store I went did not have the usual HP 15-78 Combo cartridge set I buy nor did it have an HP 78 tri-color standalone cartridge. They did have a 78XL tri-color cartrige which (supposedly) can print "up to 2X MORE PAGES" because it has twice the amount of ink the HP 78 cartridge has. The package listed the HP deskjet 940 and the store tech person assured me the cartige would fit and I bought it, installed it (yes, it did fit), and aligned the cartridges. A test print using a sprite jpg file I got from Amazon's site printed beautifully. The printer's cartridge light was off but then I noticed the icon in the System Tray. The HP DeskJet 940c Series Toolbox program still had a "Tri-Color Print Cartridge Low On Ink" warning. I turned the printer off, waited awhile, turned the printer on, still had the warning. Restarted the computer. Still had the warning. Am I doomed to always have this Low Ink warning with the 78XL cartridge? Is there some value in the Window's Registry I can chage so the warning goes away until one of the cartridge colors really does get low on ink? If I can do this and I actually do this deed, will the problem occur again if I install an 15XL cartridge? Is this a problem becuause the printer driver or some other HP software does not recognize the signals coming from the 78XL Cartrige chip? If this is the case, are you going to update the drivers from way back (say Microsoft unsupported Windows98 to and through Windows 7, skip 8.x, and 10?

Is the cartridge an original HP or is it a third party remanufactured or refilled cartridge? If you open the printer lid with the power on where does the carriage pointer point?

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.

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"

No low power warning

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