Microsoft looking into Windows 7 battery life failures on notebooks .
users claim their batteries were working just fine under Windows XP and/or Windows Vista, and others are saying it occurs on their new Windows 7 PCs.
Under Microsoft's latest operating system though, certain machines aren't doing so well, as Windows 7 spits out the following warning message: "Consider replacing your battery. There is a problem with your battery, so your computer might shut down suddenly." The warning is normally issued after using the computer's basic input output system (BIOS) to determine whether a battery needs replacement, but in this case it appears the operating system and not the battery is the problem.
These customers say their PC's battery life is noticeably lower, with some going as far as saying that it has become completely unusable after a few weeks of use. To make matters worse, others are reporting that downgrading back to an earlier version of Windows won't fix the problem.
The only official answer was posted and approved by a Microsoft moderator in June: "Windows 7 has had issues identifying certain batteries, as you can easily see searching the forum," wrote Adam M, Microsoft Certified Professional. "Due to such prevalence, it is safe to say the issue will be addressed. Thank you for reporting your troubles on the forums."
Microsoft to see if the company had made any headway. "We are investigating this issue in conjunction with our hardware partners," a Microsoft spokesperson told Ars. "The warning received in Windows 7 uses firmware information to determine if battery replacement is needed. We are working with our partners to determine the root cause and will update with information and guidance as it becomes available."
Brian Ehlert, a Microsoft MVP, posted eight times in the thread, having begun to experience the issue as well. He went from having three hours of battery life on beta and RC builds of Windows 7 to about 20 minutes on Windows 7 RTM (and from eight hours to 15 minutes on another computer). He also responded to a workaround for disabling Windows 7 from shutting down on battery issues saying that this may result in the operating system shutting down later, but saying that it doesn't fix the root cause of the problem. Another fix that worked for some, but not for Ehlert, was letting the battery drain completely outside of the operating system so that it is recalibrated. Ehlert's last response in the thread was that he went out to buy a new battery, though he has yet to report back if this fixed the problem or if the second battery is following the first one to an early grave.
The battery life issue on Windows 7 actually dates back to June 2009, according to MS. At the time, Windows 7 wasn't yet released, but the issue was apparently in both the beta and Release Candidate builds. Apparently the problem wasn't widespread enough for Microsoft's quality control team to fix it in time for the RTM build compiled in July 2009, though some users say they've only started to notice the issue with the RTM build and that beta builds worked just fine.
Windows 7 was supposed to extend battery life on notebooks, and in almost every case it certainly has. Nevertheless, there are always a few users who have issues. Microsoft's stance is that the root cause of the issue is related to specific system firmware, meaning it only affects machines with certain BIOS releases. Judging from the forum thread, however, customers disagree with Microsoft's explanation since the problem appears to affect notebooks from more than just one OEM, and some claim their vendors have informed them that it's a Microsoft problem. The phrase "class action lawsuit" is mentioned by three different posters so far; users are getting impatient with the software giant as it fails to give a timely official response. Microsoft has sold more than 60 million copies of Windows 7, and it's not clear what fraction of those owners are having problems with battery life.
However, because this warning is new to Windows 7, users moving from Vista should not necessarily ignore the message if they see it. Instead, Microsoft suggests users contact their computer maker to see whether the warning is warranted or not.
Meanwhile, Microsoft says it and the PC makers are trying to figure out what is behind the glitch. "We are working with our partners to determine the root cause and will update the forum with information and guidance as it becomes available."
SO any users who gets these warnings,please dont change your Battery unless its totally dead !!!
Little Tweak !!!
(these are tricks that worked on few Laps, Not guaranteed 100% sucess!)
It could help to avoid automatic switching off and keep the information about battery charge:
Setup Critical battery action to 'Do Nothing'
The tool is powercfg.exe
To change the 'Battery->Critical battery action->'On battery' setting to "Do nothing" using powercfg.exe
1. activate the power scheme you want to modify.
2. open an elevated command console (windows key, type 'cmd' in start menu, press "ctrl+shift+enter", click 'continue')
3. execute "powercfg -setdcvalueindex SCHEME_CURRENT SUB_BATTERY BATACTIONCRIT 0"
4. your current power scheme will show "Battery->Critical battery action->On battery: Do nothing" despite the option being unavailable in the drop box.
------------------
On some Laps this tweaks also works
Click Start>type gpedit.msc in the search box and select gpedit in programs from the results.
Once in gpedit under Computer configuration click on/expand Administrative Templates and select the last item All Settings
In the All Settings detail pane scroll down to the L's and you should find " Low battery notification level" and "Low battery notification action".
First select Low battery notification level and in the top left pane you will see edit policy. Select those blue letters.
First, click on enable.
Then you will need to set the percentage of power for the warning. Choose what you like, 10% perhaps. Then click OK.
Next move to the Low battery notification action policy item. Select it and the edit policy.
Enable it and set the action that you prefer.
Select ok and close out of the gpedit.
Reboot and test.
==============================================
Another tip too:-
1) Adjust all setting in your power scheme to minimize actions when the battery is low. (turn off all sleep or hibernate commands and reduce all warnings to 0 or 1 minute).
2) Run the following command: To change the 'Battery->Critical battery action->'On battery' setting to "Do nothing" using powercfg.exe 1. activate the power scheme you want to modify. 2. open an elevated command console (windows key, type 'cmd' in start menu, press "ctrl+shift+enter", click 'continue') 3. execute "powercfg -setdcvalueindex SCHEME_CURRENT SUB_BATTERY BATACTIONCRIT 0" 4. your current power scheme will show "Battery->Critical battery action->On battery: Do nothing" despite the option being unavailable in the drop box.
3) Run your laptop until it dies...your pc will fully crash. Then fully recharge and run until it dies again. This will recalibrate your battery. Because Windows 7 automatically shuts down your PC when it thinks the battery is low, it never recalibrates. You have to stop if from sleeping or hibernating all together to get the battery to recalibrate. I went from 66% battery wear to 0.0% overnight.
Some people also fixed via updating the ACPI driver from the maker !!
users claim their batteries were working just fine under Windows XP and/or Windows Vista, and others are saying it occurs on their new Windows 7 PCs.
Under Microsoft's latest operating system though, certain machines aren't doing so well, as Windows 7 spits out the following warning message: "Consider replacing your battery. There is a problem with your battery, so your computer might shut down suddenly." The warning is normally issued after using the computer's basic input output system (BIOS) to determine whether a battery needs replacement, but in this case it appears the operating system and not the battery is the problem.
These customers say their PC's battery life is noticeably lower, with some going as far as saying that it has become completely unusable after a few weeks of use. To make matters worse, others are reporting that downgrading back to an earlier version of Windows won't fix the problem.
The only official answer was posted and approved by a Microsoft moderator in June: "Windows 7 has had issues identifying certain batteries, as you can easily see searching the forum," wrote Adam M, Microsoft Certified Professional. "Due to such prevalence, it is safe to say the issue will be addressed. Thank you for reporting your troubles on the forums."
Microsoft to see if the company had made any headway. "We are investigating this issue in conjunction with our hardware partners," a Microsoft spokesperson told Ars. "The warning received in Windows 7 uses firmware information to determine if battery replacement is needed. We are working with our partners to determine the root cause and will update with information and guidance as it becomes available."
Brian Ehlert, a Microsoft MVP, posted eight times in the thread, having begun to experience the issue as well. He went from having three hours of battery life on beta and RC builds of Windows 7 to about 20 minutes on Windows 7 RTM (and from eight hours to 15 minutes on another computer). He also responded to a workaround for disabling Windows 7 from shutting down on battery issues saying that this may result in the operating system shutting down later, but saying that it doesn't fix the root cause of the problem. Another fix that worked for some, but not for Ehlert, was letting the battery drain completely outside of the operating system so that it is recalibrated. Ehlert's last response in the thread was that he went out to buy a new battery, though he has yet to report back if this fixed the problem or if the second battery is following the first one to an early grave.
The battery life issue on Windows 7 actually dates back to June 2009, according to MS. At the time, Windows 7 wasn't yet released, but the issue was apparently in both the beta and Release Candidate builds. Apparently the problem wasn't widespread enough for Microsoft's quality control team to fix it in time for the RTM build compiled in July 2009, though some users say they've only started to notice the issue with the RTM build and that beta builds worked just fine.
Windows 7 was supposed to extend battery life on notebooks, and in almost every case it certainly has. Nevertheless, there are always a few users who have issues. Microsoft's stance is that the root cause of the issue is related to specific system firmware, meaning it only affects machines with certain BIOS releases. Judging from the forum thread, however, customers disagree with Microsoft's explanation since the problem appears to affect notebooks from more than just one OEM, and some claim their vendors have informed them that it's a Microsoft problem. The phrase "class action lawsuit" is mentioned by three different posters so far; users are getting impatient with the software giant as it fails to give a timely official response. Microsoft has sold more than 60 million copies of Windows 7, and it's not clear what fraction of those owners are having problems with battery life.
However, because this warning is new to Windows 7, users moving from Vista should not necessarily ignore the message if they see it. Instead, Microsoft suggests users contact their computer maker to see whether the warning is warranted or not.
Meanwhile, Microsoft says it and the PC makers are trying to figure out what is behind the glitch. "We are working with our partners to determine the root cause and will update the forum with information and guidance as it becomes available."
SO any users who gets these warnings,please dont change your Battery unless its totally dead !!!
Little Tweak !!!
(these are tricks that worked on few Laps, Not guaranteed 100% sucess!)
It could help to avoid automatic switching off and keep the information about battery charge:
Setup Critical battery action to 'Do Nothing'
The tool is powercfg.exe
To change the 'Battery->Critical battery action->'On battery' setting to "Do nothing" using powercfg.exe
1. activate the power scheme you want to modify.
2. open an elevated command console (windows key, type 'cmd' in start menu, press "ctrl+shift+enter", click 'continue')
3. execute "powercfg -setdcvalueindex SCHEME_CURRENT SUB_BATTERY BATACTIONCRIT 0"
4. your current power scheme will show "Battery->Critical battery action->On battery: Do nothing" despite the option being unavailable in the drop box.
------------------
On some Laps this tweaks also works
Click Start>type gpedit.msc in the search box and select gpedit in programs from the results.
Once in gpedit under Computer configuration click on/expand Administrative Templates and select the last item All Settings
In the All Settings detail pane scroll down to the L's and you should find " Low battery notification level" and "Low battery notification action".
First select Low battery notification level and in the top left pane you will see edit policy. Select those blue letters.
First, click on enable.
Then you will need to set the percentage of power for the warning. Choose what you like, 10% perhaps. Then click OK.
Next move to the Low battery notification action policy item. Select it and the edit policy.
Enable it and set the action that you prefer.
Select ok and close out of the gpedit.
Reboot and test.
==============================================
Another tip too:-
1) Adjust all setting in your power scheme to minimize actions when the battery is low. (turn off all sleep or hibernate commands and reduce all warnings to 0 or 1 minute).
2) Run the following command: To change the 'Battery->Critical battery action->'On battery' setting to "Do nothing" using powercfg.exe 1. activate the power scheme you want to modify. 2. open an elevated command console (windows key, type 'cmd' in start menu, press "ctrl+shift+enter", click 'continue') 3. execute "powercfg -setdcvalueindex SCHEME_CURRENT SUB_BATTERY BATACTIONCRIT 0" 4. your current power scheme will show "Battery->Critical battery action->On battery: Do nothing" despite the option being unavailable in the drop box.
3) Run your laptop until it dies...your pc will fully crash. Then fully recharge and run until it dies again. This will recalibrate your battery. Because Windows 7 automatically shuts down your PC when it thinks the battery is low, it never recalibrates. You have to stop if from sleeping or hibernating all together to get the battery to recalibrate. I went from 66% battery wear to 0.0% overnight.
Some people also fixed via updating the ACPI driver from the maker !!