Clamshell mode + battery power = repeated sleep

I've got an odd one. My 2009 MacBook Pro (15") running 10.6.7 sits on a cooling pad plugged into a powered USB hub. I'm using a 21 inch LCD to run in clamshell mode, and it works fine with the lid down or up when it is plugged into the AC power adapter.
But unplugging the adapter causes the Mac to fall asleep about 10 seconds after unplugging. A keystroke or mouse click reawakens it -- for about 10 more seconds, then off to sleep it goes again. This repeats over and over. It seems to happen mostly when the lid to the Mac is closed, when the lid is open, not so much. Is this due to heat or what? Obviously the built in LCD has much different resolution than the external monitor, so I pretty much have to awaken it with the lid closed.

AC power is required when using clamshell mode. See http://support.apple.com/kb/HT3131.

Similar Messages

MBP running out of battery power before sleeping - Help!

Hi
My MacBook Pro has been running out of battery power before the memory-saving sleep mode kicks in, so it dies with a little click of the HD. It's not a hibernation state as when I reattach the power supply it boots up a new session.
I've noticed this since upgrading to Snow Leopard last year, but put it down to an old battery that had 45% charge and wasn't powering the MBP properly. I now have a replacement A1175 5600mAh battery which is giving me 2-3hrs usage (which I'm pleased at), but now it still dies before sleeping!
I have tried to cycle the new battery, but can't. I have reset the SMC several times, with no effect.
I used to cycle the battery every week or two, running it down until it would no longer wake from sleep, recharge overnight etc, but now I can't do this because it will die before sleeping!
I've read quite a few articles over the net about this issue, but there seems like no cure. It's really annoying me now as I frequently work on the move and a dying MBP could potentially be disastrous.
Can anyone shed some light on this issue? Is there something I haven't tried yet? I think it's a late '06 MBP.
From System Profiler:
Hardware Overview:
Model Name: MacBook Pro
Model Identifier: MacBookPro2,2
Processor Name: Intel Core 2 Duo
Processor Speed: 2.16 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 3 GB
Bus Speed: 667 MHz
Boot ROM Version: MBP22.00A5.B07
SMC Version (system): 1.12f5
Battery Information:
Model Information:
Serial Number: ˇ{ïwl"Ó*%#Û˙� $«\
Manufacturer: SMP
Device name: ASMB012
Pack Lot Code: a0b0
PCB Lot Code: c0f1
Firmware Version: 8800
Hardware Revision: 0000
Cell Revision: 0000
Charge Information:
Charge remaining (mAh): 1320
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 5315
Health Information:
Cycle count: 12
Condition: Normal
Battery Installed: Yes
Amperage (mA): 1500
Voltage (mV): 11560
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: No
Current Power Source: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 0
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: No
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
ID: 0x0100
Wattage (W): 85
Revision: 0x0000
Family: 0x00ba
Serial Number: 0x001e1900
Charging: Yes

If you are not getting a warning, then there is something amiss with your battery. If a SMC reset and calibration does not fix the problem, then you may need to make an appointment at the genius bar and arrange to have your battery tested.
My old battery started doing the same thing--shutting down without warning. I replaced it, and the replacement battery started doing the exact same thing. I then returned the replacement, and the next replacement battery behaves in a normal fashion.
My first battery was worn out. My second battery was defective. My third battery is good.
Your battery should still be under warranty. Go back to where you got it and show them what it is doing and see if you can get a replacement.
Good luck!

Battery, Power, Deep Sleep and Spotlight problems after 10.9.4 update

Hi, I have a Macbook Pro 8,1 13in (Late 2011). I updated to the latest version of Mavericks (10.9.4) and iTunes on Sunday, right after that my macbook started to goes into Deep Sleep after closing the lid, even when the battery was 80% of charge. My battery normally lasts for almost 5 hours. After it went to deep sleep, the power bottom does not respond. Also, I have noticed that spotlight process in Monitor was consuming so huge amount of resources. This problem persists in Boot Camp. There is no way to turn the machine up without plugging it to the power cord. Sometimes it charges the battery as usual, sometimes it does not recognize the battery. Suddenly, the mac goes into sleep mode while I'm using it.
I have researching and troubleshooting in order to fix this but no solution. I have reset the PRAM and SMC. I made a backup of my files and installed Mavericks from the ground with external storage in order to erase the entire disk, no solution. I made an Internet Recovery and downgraded it to Lion, it worked for 2 hours and then I upgraded again to Mavericks (10.9.0) and the same problem came again, the upgraded to 10.9.4 and no solution at all.
I have searched on internet and there are other people experiencing this problem but nobody is able to bring a valid solution.
This is my battery's health:
Battery Information:
Model Information:
Serial Number: 9G1450LRJD3MA
Manufacturer: DP
Device Name: bq20z451
Pack Lot Code: 0
PCB Lot Code: 0
Firmware Version: 201
Hardware Revision: 2
Cell Revision: 158
Charge Information:
Charge Remaining (mAh): 3204
Fully Charged: No
Charging: Yes
Full Charge Capacity (mAh): 4859
Health Information:
Cycle Count: 931
Condition: Normal
Battery Installed: Yes
Amperage (mA): 2406
Voltage (mV): 12273
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Wake on AC Change: No
Wake on Clamshell Open: Yes
Wake on LAN: Yes
Current Power Source: Yes
Display Sleep Uses Dim: Yes
PrioritizeNetworkReachabilityOverSleep: 0
Standby Delay: 4200
Standby Enabled: 0
Battery Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 2
Wake on AC Change: No
Wake on Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Standby Delay: 4200
Standby Enabled: 0
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
ID: 0x0100
Wattage (W): 60
Revision: 0x0000
Family: 0x0085
Serial Number: 0x008d9c78
Charging: Yes

Reseting the NVRAM/PRAM doesn't solve my problems.
Hi, since you have performed NVRAM /PRAM reset, try:
Intel-based Macs: Resetting the System Management Controller (SMC)
and if still issues persist, try: OS X: What is Safe Boot, Safe Mode?
Cheers

Clamshell Mode Prevents Waking from Sleep

I've got a MacBook Pro (Intel, 2.33GHz) running 10.5. Since installing Leopard I've been bumping into periodic issues with trying to wake from sleep while in clamshell mode. (I've got a Samsung LCD monitor and a USB keyboard plugged into it, and most of the time the laptop itself stays closed.) Every now and then--mostly if the laptop has been asleep for a while, say, overnight or all day--it'll refuse to wake up. I've never had one of the kernel panics described in this thread: it just won't wake up, even if I open the laptop, until I unplug the external monitor from the monitor-out socket. Once I unplug the external, the onboard screen comes right on, and I can even re-attach the external monitor and it'll work just fine; but if I close the laptop, I'm back at Square 1 with a comatose computer.
Restarting the machine doesn't help. Tossing the PowerManagement.plist file solves the problem temporarily, but eventually it recurs. Anybody have any insights? Other things I might try? Similar experiences?

Try Ejecting the External HD before sleeping the Mac.
Then see if the Mac Mini will wake and re-mount the External HD.

Battery doesn't sleep - goes straight to shutdown at 60-80%

Hi
I don't often unplug my MBP, but when I do it never seems to give a battery warning or goes to sleep. When it hits anything from 60-80% battery left it just shuts down.
The indicators on the back of the battery seem to correspond to the percentage shown on the screen.
I have read about recalibrating my battery, but since it won't sleep, I can't figure out how to make that happen.
Below is my info from System Profiler:
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 20
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 5
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 1
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 4555
Remaining Capacity (mAh): 4057
Amperage (mA): 1292
Voltage (mV): 12521
Cycle Count: 40
AC Charger Information:
Connected: Yes
Charging: Yes
Hardware Configuration:
UPS Installed: No
Any help would be appreciated.
thanks
S

I have the same problem, my laptop shutsdown isnted of slepp mode, even when fully charged and plugged in. Now again the meter will not show a full charge, though yesterday it did. This only started within the last week, give or take a few days, and the shutdowns are increasing. The battery update page advises to download and install 1.2 firmware for that battery when the current versions for 15" and 17" is 1.3 and the replacement program which was primarily for 15" Pro's only closed on 7/25. Based on most of the post I have read, this issue has been creeping up the last few days in newer and older batteries, and mostly in systems that are at least 1 year old. Makes me wonder if the rumors of the programmed "self-destruct' are true. Any case this is my power info (note that over the 4 points I pulled info for, the mA decrease as the battery charges, is this normal? The mv increase, but the mA decrease, though the mAH increase??)-
08/03/08 12:11 AM EST (57%)
Battery Information:
Model Information:
Serial Number: SMP-ASMB014-*** <Edited by Moderator>
Manufacturer: SMP
Device name: ASMB014
Pack Lot Code: 0001
PCB Lot Code: 0000
Firmware Version: 0102
Hardware Revision: 0202
Cell Revision: 0100
Charge Information:
Charge remaining (mAh): 2851
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 4973
Health Information:
Cycle count: 321
Condition: Good
Battery Installed: Yes
Amperage (mA): 3304
Voltage (mV): 11891
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 115
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 29
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: No
Battery Power:
System Sleep Timer (Minutes): 40
Disk Sleep Timer (Minutes): 180
Display Sleep Timer (Minutes): 15
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: No
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
Charging: Yes
08/03/08 1:06 AM EST (91%)
Battery Information:
Model Information:
Serial Number: SMP-ASMB014-*** <Edited by Moderator>
Manufacturer: SMP
Device name: ASMB014
Pack Lot Code: 0001
PCB Lot Code: 0000
Firmware Version: 0102
Hardware Revision: 0202
Cell Revision: 0100
Charge Information:
Charge remaining (mAh): 4533
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 4973
Health Information:
Cycle count: 321
Condition: Good
Battery Installed: Yes
Amperage (mA): 1256
Voltage (mV): 12483
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 115
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 30
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: No
Battery Power:
System Sleep Timer (Minutes): 40
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 30
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: No
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
Charging: Yes
08/03/08 1:44 AM (99%)
Battery Information:
Model Information:
Serial Number: SMP-ASMB014-*** <Edited by Moderator>
Manufacturer: SMP
Device name: ASMB014
Pack Lot Code: 0001
PCB Lot Code: 0000
Firmware Version: 0102
Hardware Revision: 0202
Cell Revision: 0100
Charge Information:
Charge remaining (mAh): 4973
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 4973
Health Information:
Cycle count: 321
Condition: Good
Battery Installed: Yes
Amperage (mA): 328
Voltage (mV): 12602
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 115
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 30
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: No
Battery Power:
System Sleep Timer (Minutes): 40
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 30
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: No
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
Charging: Yes
08/03/08 1:59 AM (100%)
Battery Information:
Model Information:
Serial Number: SMP-ASMB014-*** <Edited by Moderator>
Manufacturer: SMP
Device name: ASMB014
Pack Lot Code: 0001
PCB Lot Code: 0000
Firmware Version: 0102
Hardware Revision: 0202
Cell Revision: 0100
Charge Information:
Charge remaining (mAh): 4973
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 4973
Health Information:
Cycle count: 321
Condition: Good
Battery Installed: Yes
Amperage (mA): 176
Voltage (mV): 12593
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 115
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 30
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: No
Battery Power:
System Sleep Timer (Minutes): 40
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 30
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: No
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
Charging: No

Mac Book Pro Shuts down on Battery Power

First, I apologize to everyone for asking this question yet again. I have gone through the previous posts and I am still at a loss. So thank you for your patience and help.
When I run my MacBook pro on battery power it will run for around 15 - 20 minutes... then just be dead. No low battery warning. No shut down. Just poof and gone.
I have looked at my power settings to see if my battery is bad. But I don't have a Status indicator in there. I see This:
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 0
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 0
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 1185
Remaining Capacity (mAh): 1185
Amperage (mA): 0
Voltage (mV): 12426
Cycle Count: 174
AC Charger Information:
Connected: Yes
Charging: No
Hardware Configuration:
UPS Installed: No
I have also looked at the directions on http://support.apple.com/kb/ht1490 about how to calibrate my battery. It says:
" 1. Plug in the power adapter and fully charge your PowerBook's battery until the light ring or LED on the power adapter plug changes to green and the onscreen meter in the menu bar indicates that the battery is fully charged.
2. Allow the battery to rest in the fully charged state for at least two hours. You may use your computer during this time as long as the adapter is plugged in.
3. Disconnect the power adapter while the computer still on and start running the computer off battery power. You may use your computer during this time. When your battery gets low, the low battery warning dialog appears on the screen.
4. At this point, save your work. Continue to use your computer; when the battery gets very low, the computer will automatically go to sleep.
5. Turn off the computer or allow it to sleep for five hours or more.
6. Connect the power adapter and leave it connected until the battery is fully charged again."
Only I have a problem withe step 3 and 4. I don't get the warning, and it doesn't go to sleep. So, I don't think any calibration is working.
Do I need a new battery? Should I just buy one? This computer is WAY out of warranty and I never purchased and apple care plan for it.
Again, than you for any and all advice on what I may need to do.

I think it's time to buy a new battery

How long should you be able to use battery power?

Hi there I have a MacBook Pro 15inch. I'm just wondering how long I should be able to operate on battery power before I need to recharge? It only seems to last 2 hours and this is the second battery I've had. I'm sure it used to last longer.
info...
Battery Power:
System Sleep Timer (Minutes): 23
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 11
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 4491
Remaining Capacity (mAh): 1820
Amperage (mA): 3087
Voltage (mV): 12252
Cycle Count: 117
Cheers
Jo

Here's the article on how to calibrate your battery:
http://support.apple.com/kb/HT1490
I don't know if you will be able to calibrate your battery successfully at this point or not. If you can, it will likely look even more unhealthy.
Sadly, I think your battery is on its way out. As Retired Engineer points out, it hasn't had enough usage for optimum performance at only 69 cycles in close to 3 years. They also will deteriorate over time, whether or not you calibrate them or use them properly.
You might find Battery University an interesting read:
http://www.batteryuniversity.com/partone-21.htm
Also this kb article from Apple:
http://www.apple.com/batteries/notebooks.html
I don't think there is any way to bring this battery back to health. Unfortunately, the cure is going to be a new battery.
Good luck!

Macbook Pro powers off when on battery power

Help! My MBP 17" now powers off after a couple of minutes on battery power. When this happens, trying to boot again, the system will power off again while loading the OS. The only way to get the MBP to boot then is to plug in the AC adaptor.
I've reset the SMC and reconditioned the battery. Both the OS and the battery think the battery is fully charged. This didn't happen before upgrading to Leopard.

I believe the color of the magsafe was green and that it wasn't charging. (The MBP thought the battery was at 96%.)
Here's the profile after I got to work and plugged in my magsafe (which is a second magsafe I keep at work), the color is amber:
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 2
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
Charging: Yes
Battery Information:
Model Information:
Manufacturer: SMP
Device name: ASMB014
Pack Lot Code: 0001
PCB Lot Code: 0000
Firmware Version: 0102
Hardware Revision: 0202
Cell Revision: 0100
Charge Information:
Charge remaining (mAh): 5048
Fully charged: No
Charging: Yes
Full charge capacity (mAh): 5472
Health Information:
Cycle count: 97
Battery health: Good
Battery Installed: Yes
Amperage (mA): 469
Voltage (mV): 12390
After charging, the magsafe is green and this is what profiler says:
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 2
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
Charging: No
Battery Information:
Model Information:
Manufacturer: SMP
Device name: ASMB014
Pack Lot Code: 0001
PCB Lot Code: 0000
Firmware Version: 0102
Hardware Revision: 0202
Cell Revision: 0100
Charge Information:
Charge remaining (mAh): 5472
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 5472
Health Information:
Cycle count: 97
Battery health: Good
Battery Installed: Yes
Amperage (mA): 200
Voltage (mV): 12368

Battery drained during sleep

My new 13'' MBA seems to use quite some battery power during sleep -much more than I experienced with my 15''MBP.
I am used to never shutting down my Macbooks, but simply close the lid to put it to sleep. Usually, I find the battery to be less than I left, but today I found the battery to be fully drained.
Am I missing something with the power settings? Doesn't the 30 day stand by time refer to "shutting down the lid" and preserving battery life for days?

Hi
Have you applied the Firmware update? If so, try resetting the PRAM.
http://support.apple.com/kb/ht1379
Adam

MBP (13-inch, early 2011) goes into hibernation instead of safe sleep upon closing the lid (only when using battery power)

MBP details
13-inch MacBook Pro, early 2011 (model identifier: MacBookPro8,1)
Running Yosemite, OS X 10.10.1 (however, problem started while using Mavericks)
2.5 GHz Intel Core i5
4 GB memory
Symptoms
* the MBP goes into hibernation instead of sleep upon closing the lid on battery power (i.e., when AC adapter is NOT connected)
-- problem does not occur when AC adapter is connected
* putting the computer to sleep by other means does not induce the problem; these other means include:
-- [i] option+command+Power,
-- [ii] Apple Icon --> Sleep,
-- [iii] in Terminal: pmset sleepnow
* the battery is NOT getting drained at all; if I close the lid on 87%, the battery is still at about 87% when I get the MBP back up and running
To be as clear as possible:
(1) MBP is on and in use (power source: battery); battery is at X%
(2) the lid is then closed
(3) the battery indicator light glows bright for about 10 seconds, then shuts off, and with it so does the MBP (all fans and sounds cease)
(4) opening the lid and pressing any key on the keyboard does nothing (the computer is not sleeping)
(5) to turn the MBP back on, I must hit the power button once; this brings up and the gray screen and loading bar indicative of returning from hibernation
(6) log in; battery is still at X%
Attempted Solutions / Fixes
There are Apple Discussions addressing similar MBP issues, many of which at least have work-arounds, if not full-blown solutions. However, I have tried many of the proposed work-arounds and solutions; nothing has solved my problem. Such attempted solutions include:
* made sure EFI/SMC firmware was up to date
* updated all software
* logged in as a different user
* booted in Safe Mode
* reset the PRAM
* repaired disk permissions using Disk Utility
* repaired additional disk permissions in recovery mode (a la this chron.com advice)
* ran the Apple Hardware Test multiple times (short test while plugged in, short test on battery, extended test while plugged in, extended test on battery)
* booted from an external known-good OS on USB drive
* reseated the RAM
* used MemTest to test the RAM's health (it was good)
* tested my battery's health with the app Battery Health (it is healthy!)
* booted my computer with one stick of the MBP's original RAM at a time (figured "why not?")
* booted my computer using other sticks of RAM
* checked my power management settings using PMSET in the terminal (e.g., pmset -g); tried various hibernation modes (e.g., sudo pmset -a hibernationmode X, where X=0,1,3, etc)
* searched/grepped through my power management logs and Console messages to look for googleable items (e.g., pmset -g log | grep WORD, where WORD=failure, sleep, etc); still have not found help online
* brought the MBP to a Mac Genius
-- he ran some further tests, but found nothing;
-- he re-installed my OS as a hopeful-hail-mary-just-maybe-last-ditch effort; the problem persisted!
-- we both agreed that we had ruled out a software cause
-- he offered me to leave my MBP to get fixed for a flat fee of $300.00 (which after a couple weeks of trying to figure this out is starting to sound more and more reasonable)
Given that it is likely not a software issue, what hardware might it be? By booting from an OS on an external drive, I think I've ruled out a bad hard drive or hard drive cable. Also, given that inducing sleep in any way other than closing the MBP's lid does not cause the problem, it seems there might be a wire (or something) in the hinge section of the MBP that gets moved when the lid is closed possibly causing some kind of short circuit...or something.
If someone with more experience interpreting Console messages, for example, can help, I'd be happy to provide some logs, or any additional information.
Thank you for your time and consideration.

Ok, this is a crazy-simple, quasi-embarrassing fix, but I'll post it anyway just in case anyone is having a similar problem (for example, this guy: Changes to pmset being ignored).
Some time around late last August / early September (2014) this issue began happening for me (specifically, issue = closing lid while on battery power induces hibernation / shut down instead of sleep --- independent of hibernation mode). Maybe it was when I upgraded to Yosemite (not sure what the exact date of that was). As detailed in my original post, I frantically tried everything I could think of... At that time, however, I had quite a few presentations and posters to create and present at meetings and conferences, so I held off fixing it for a couple of months and returned to it this past week, where I tried a few more things listed above, but again to no avail...
This morning, I simply tried fudging around with all my power management settings again (via pmset in Terminal). The simplicity of the fix surprised me. But now that I understand it, I know it is likely the same fix for other threads I've read, such as the one above:
(TLDR in bold)
(1) Take note of your power management settings (Terminal: pmset -g custom)
(2) Is the "standby" flag set to 0? If so, set it to 1. Wa-la! Done.
This fix is crazy and embarrassing b/c I was so close to it for so long. I tried changing my hibernation modes multiple times (sudo pmset -a hibernatemode X, where X=0,1,3,25,etc). I read about manipulating other PMSET settings that helped other people with newer MBPs, like "autopoweroff" and "autopoweroffdelay" --- settings that I do not have on the MBP early 2011 (check your settings: pmset -g cap). And most amazingly of all, I even messed with the "standbydelay" setting, trying to make it so long that my computer should never go into hibernation... Yet, from what I can tell by looking over my notes, I never simply set "standby" from 0 to 1.
There are interesting questions that arise due to this fix. For example, why did this problem persist on clean installs of OS Yosemite? Is "standby" being set to 0 the Yosemite default? I'm not sure. If it is, then Kappy was right: this was normal behavior... It just wasn't always the normal behavior...at least not for my MBP. Normal behavior (hibernatemode 3) used to be (and now is again) that the MBP goes into safe sleep, and then only after an allotted amount of time will it go into full-blown hibernation.
NOTE: the "standby" and "standbydelay" PMSET settings are not available in some earlier MBP models (e.g., my brother has a 2010 and does not have these settings); so if you're having a similar problem with an earlier model, this fix might not be of any help to you.

Yoga 2 Pro Draining Battery Fast in Sleep Mode

I have a new Yoga 2 Pro with i7 processor. It works great and normal battery life is about 4-5 hours. But with a fully charged battery, i can close the lid at night triggering sleep mode, and wake up to an almost dead battery.
Why is this happening? It's really dissapointing and I'm going to return it if I can't find a fix. I'm on the latest BIOS with all current updates. I am not using Hibernate mode.
Closing the lid shoud not cause battery to continue to drain at normal usage rates.
I'm hoping it's the WINDOWS 8 software but I've tried all the settings I can find.

the OP said battery was draining overnight because y2p was not going into sleep mode. then op changed some settings and, as i understand it, now his y2p does not drain battery overnight because he pushes power button and it goes into hibernate mode before closing lid.
I would like to raise the issue of the difference between hibernate and sleep mode. I too find that if i put my y2p (and my mbp-bootcamp) into hibernate mode then my battery does not drain overnight. however, both my laptops drain the battery overnight in sleep mode... anyone have clear understanding of this? i've look at many articles on the web, but haven't found any that specifically indicate how fast sleep mode should drain batteries. I think my gf's mba-OSx also drains overnight in sleep mode and OSx doesn't even have a hibernate option (correct me if i'm wrong)...

HT201263 When my Ipod touch is in autolock I can only restart the device holding the sleep/wake button and home button at the same time for 10 seconds. While in auto-lock it is using battery power and will do so until the battery is drained. Whats wrong

When my Ipod touch is in autolock I can only restart the device holding the sleep/wake button and home button at the same time for 10 seconds. While in auto-lock it is using battery power and will do so until the battery is drained. Whats wrong?

- Try a reset. Nothing is lost:
Reset iPod touch: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears
- Connect the iPod to your computer and try to restore via iTunes. Try placing in Recovery mode if necessary to restore.
- If you can't turn the iPod completely off, let the batter fully drain. After charging for at lerast anhour try again
- If still not successful time for an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem.

Forum Mods, Please make this a sticky: BlackBerry PlayBook battery power charge, discharge characteristics, and guidance on extending battery life

BlackBerry PlayBook battery power charge, discharge characteristics, and guidance on extending battery life
KB27705
Overview
The BlackBerry PlayBook may come to a power state where it is unable to power on; a Yellow LED may flash in a sequence of 5 flashes, the BlackBerry PlayBook may boot up to the BlackBerry PlayBook Logo and then power off, may not power on at all.
Discharge behavior under normal use:
Under normal active use, a battery drained to 10% will cause the device to prompt the BlackBerry PlayBook user (notification and audible beep)
Without connecting a charger the device will automatically shut down at 3.53V (0%)
Pressing the power button may allow successful boot, but it will turn off again very quickly
Discharge behavior under no use:
A device left unused but in ‘Stand By’ will warn the BlackBerry PlayBook user at 10% (notification and audible beep)
The warning may not be noticed and the device will go back to ‘Stand By’
Letting the device drain in standby mode drains the battery slower, but more completely
Device will still shut off at 3.53V (0%), but it less likely to successfully boot afterwards
Discharge behavior under 3.53V (0%):
If the device is left to shutoff, the battery will continue to drain below 3.53V due to quiescent current draw from the motherboard and the battery fuel gauge
With the battery between 2.7V-3.53V, pressing the power button causes the LED to flash a pattern (1 solid red light followed by 5 yellow blinks) to indicate low battery (PlayBook Tablet OS version 1.0.5, and above)
Below 2.7V there is no activity, or LED pattern displayed
Charge Behaviour:
The provided charger should be used to charge the device. The optional 12 volt rapid charger is may reduce charging times
to approximately 3 to 4 hrs. Standard Blackberry smartphone chargers, other AC adapter USB chargers, or computer USB ports
are not recommended for the sole purpose of charging the PlayBook as with these methods it may take more that 12 hours to
charge the BlackBerry Playbook.
If the battery voltage is below 3.53V(0%) then the charging behaviour is dependent on the software version. The charging code will limit the charging current to under 400 milliamps, during which time, it may take an hour to reach 3.53 Volts. Once the battery voltage rises past 3.53 volts, then "high-rate" charging will start. If, after charging the Tablet for 4 to 6 hours still does not result in LED activity, attempt to force power on the BlackBerry Playbook by pressing and holding only the Power Button for only 20 seconds.
Prior to BlackBerry Tablet OS 1.0.5:
A BlackBerry PlayBook will never charge while powered off in BlackBerry Tablet OS versions prior to 1.0.5.
The device will show a red light when the charger is connected and then nothing more
Repeated connection of the charger can recover the device in some instances.
Once the battery voltage rises above 3.53V the system will boot and the UI will show charging
Starting in BlackBerry Tablet OS 1.0.5:
The device will show a solid red LED, followed by a solid yellow LED as the device boots into charging mode. This is followed by a yellow pulsating LED indicating charging in progress.
The time span between the red and yellow lights can be as long as 45 seconds as the device boots into charging mode.
Once the yellow LED illuminates, the device can be started, but it is advisable to let it charge for at least 3.5 hours to achieve a sufficient charge.
The device will show a solid green LED once the device is fully charged.
Starting in BlackBerry Tablet OS 2.0.1:
Once the yellow LED begins pulsating indicating charging mode, if the BlackBerry PlayBook is disconnected from the charger, the following graphic will be displayed on the screen, indicating charging is not complete, and to reconnect the power source. The graphic will be displayed for 20 seconds before the BlackBerry® PlayBook powers off if the power source is not reconnected. The same graphic will also be displayed if the BlackBerry PlayBook is turned on and there is not sufficient power to perform the boot process.
If the BlackBerry PlayBook is plugged into a power source, and the power button is pressed to power on the device, the following graphic will be displayed if there is not sufficient power to perform the boot process. If this occurs, the BlackBerry PlayBook should be left plugged in to gain enough charge to boot.
Additional Information
Turning off the BlackBerry PlayBook and using standby mode.
Checking the battery power levelOn the status bar, tap the battery icon. When the battery power level is low, the BlackBerry PlayBook tablet will display a notification.
Enter standby modePress the Power button on the top of the BlackBerry PlayBook..
Exit standby modeSwipe down from the top frame to the bottom frame
Turn off the BlackBerry PlayBookPress and hold the Power button. Tap Shut Down.
To extend the BlackBerry PlayBook battery life, charge it regularly, close unused applications and keep the BlackBerry Playbook out of the sun and other hot places. The following may also be used to extend battery life:
Dim the screenOn the status bar, tap the Options icon (a gear), select the Screen tab and change the Brightness setting
Turn off the screen automaticallyOn the status bar, tap the Options icon, select the Screen tab and change the Backlight Time-out field
Enter standby mode automaticallyOn the status bar, tap the Options icon, select the Screen tab and change the Standby Time-out field
Turn off Wi-Fi when not in useOn the status bar, tap the Wireless icon and set the Wi-Fi switch to Off
Turn off Bluetooth connectivity when not in use
On the status bar, tap the Bluetooth icon and set the Bluetooth switch to Off
Pause apps when you show the home screen or switch between apps On the status bar, tap the Options icon, select the General tab and set the Application Behavior switch to Paused
With the upgrade to PlayBook OS 2.1.0.1032 the following message may be displayed when connecting the Playbook to a PC using the micro-USB cable:
Unable to charge battery with connected source
This message is displayed because the voltage provided is insufficient for charging. The USB voltage is limited to 384mA even if the maximum tolerance is 500mA. The voltage is limited to 384mA by design to avoid violating the USB specification which states USB devices cannot draw more than 500mA from the USB port.

TroyTempest wrote:
I guess it's not what you know but whom you know.
Yup! Glad you're here though. I appreciate your contributions in the forums myself.

Clamshell mode & possible battery issues

Hello everyone!
I just started using my MacBook Air in closed «Clamshell» mode. I bought my MacBook in October and since I got it I read all the advice on how to ameliorate battery performance. I also read that keeping the computer plugged in all the time could damage the battery. As I also noticed, Clamshell mode won't work unless the computer is plugged in continuously (once, I took off the cable and my ext monitor stopped).
So my question lies to these facts; my workflow obliges me to use Clamshell for the most percent of the time (I type and can't use the laptop's keyboard all the time); laptop is needed to be on charge all time; won't this ruin my battery's life?
Thank you in advance!

Apple strongly recommends that you not use the computer plugged in all the time, true. But if you just make sure to use it on battery a couple times a month you'll be okay. Long ago I set a calendar event for one Friday evening a month. It reminds me I need to use the computer on battery during the weekend. My 2009 MBA is now 6 years old with its original battery! which is still getting just above 80% of the full charge it did when it was new. It has just slightly more than 400 cycles which clearly shows that it was used more on power than battery.

HP Envy 14 (2020NR) - randomly missed keystrokes after wake from sleep (on battery power only)

While running on battery power, sometimes when I wake from sleep, keystrokes will randomly be missed. It doesn't always happen, and I need to do more experimentation to figure out just how often it occurs. To fix it, I just reboot the computer (while still on battery power), and the problem seems to be gone. It can also be fixed by simply plugging in to A/C power. I am using Windows 7 Home Premium 64-bit.
I have seen similar threads where people say that repeated keystrokes are missed, or rapid keystrokes are missed -- but so far those threads have remained unanswered, and my problem seems a little different in that no one else has mentioned a correlation with running on battery power. The problem never occurs otherwise, for me.

If you are still under warranty you need to return the laptop for service. If not I am afraid it is a motherboard issue requiring replacement. You have done all the diagnostics a professional would do. The fact that the battery works in another computer tells us it is not the battery.

Clamshell mode + battery power = repeated sleep

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