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Windows 7: "Consider Replacing Your Battery"

04 Feb 2010   #21
antt

Windows 7 build 7100 x86
 
 

Quote   Quote: Originally Posted by thefabe View Post
Quote   Quote: Originally Posted by TheTeZ View Post
i doubt windows 7 is the cause.... i think people started checking..... people use their laptops as regular computers, and leave them plugged in the entire time they are in use. that is HORRIBLE for the battery! i think the incorrect usage type is more to blame. i doubt after a full charge most people take out the battery (if they are going to leave it plugged in) like they are supposed to. i would love to hear winodws come out and "comment on this" with something along the lines of, "dont be stupid" "read your manual" "its a rechargeable battery, learn to use it"

but we shall see... i guess its possible that it COULD be a windows issue... but i personally do not believe it/
I agree with having it plugged in all the time wish i could get my Mom to understand it still even after Gateway told her it would shorten the battery life still plugged in. Fabe
There is no real problem with leaving the battery plugged in if the laptop is designed to disperse heat well. Many of the newer laptops are designed to keep the battery at/near room temperature, which is fine for them.
Older laptops were less well-designed, and so caused the batteries to heat up, which is the killer.


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05 Feb 2010   #22
TheTeZ

Windows 7 -x6
 
 

Quote   Quote: Originally Posted by raydabruce View Post
I tried that workaround and it didn't work for me. And I doubt it worked for him either (he doesn't say what happened after it finished charging or what the capacity percentage change (if any) was. If the EEPROM in the battery has been written with bad data by Win 7, (the cause of the problem) there doesn't seem to be any remedy. The "workaround" seem only to have stopped the error msg (while charging). If it were as easy as the "workaround" says, I doubt this issue would still be in the news.

Another poster in another thread installed Linux after Windows 7 damaged his battery by reducing the capacity of a new battery to only 62% in just a few days usage. In Linux, he drained the battery totally and then re-charged it while the laptop was off for several hours. In his case, he gained back about 20% more capacity (to 81%). So there may be something to this method. This is the real issue here: Windows 7 writing inaccurate data to the battery's EEPROM saying it's capacity is reduced when, if fact, it is not. But, because the battery reports reduced capacity, Windows will shut down the machine prematurely and there appears to be no fix as of yet. An update to Windows ACPI and battery management driver is probably the fix that is needed.

I hope Microsoft finds a solution soon so I can go back to Windows 7.

so then just download some linux iso, and pop in the live CD every now and then, let it charge, then be on your way ;=]
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05 Feb 2010   #23
aem

Windows 7 Ultimate 64Bit
 
 

Guys for my lappy, it was the Microsoft ACPI-Compliant Control Method Battery PnP device, as soon as i disabled this is Device Manager, the icons message just went away. My XP dualboot is fine so i disabled it on my W7.
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07 Feb 2010   #24
raydabruce

Windows 7 Ultimate x86 and Ubuntu Linux 9.10
 
 

Quote   Quote: Originally Posted by aem View Post
Guys for my lappy, it was the Microsoft ACPI-Compliant Control Method Battery PnP device, as soon as i disabled this is Device Manager, the icons message just went away. My XP dualboot is fine so i disabled it on my W7.
That's fine for getting rid of the message but it won't correct the wrong values for battery capacity that Windows 7 has written to your battery's EEPROM chip.
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07 Feb 2010   #25
aem

Windows 7 Ultimate 64Bit
 
 

Quote   Quote: Originally Posted by raydabruce View Post
Quote   Quote: Originally Posted by aem View Post
Guys for my lappy, it was the Microsoft ACPI-Compliant Control Method Battery PnP device, as soon as i disabled this is Device Manager, the icons message just went away. My XP dualboot is fine so i disabled it on my W7.
That's fine for getting rid of the message but it won't correct the wrong values for battery capacity that Windows 7 has written to your battery's EEPROM chip.
Can you explain more on this value and where i can check it?
My System SpecsSystem Spec
07 Feb 2010   #26
snlu178

Windows 7
 
 

How I fixed my "consider replacing your battery".

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.
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08 Feb 2010   #27
Pusspa

 
 

Quote   Quote: Originally Posted by snlu178 View Post
How I fixed my "consider replacing your battery".

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.
how do i remove this changed setting when i have finished?
My System SpecsSystem Spec
08 Feb 2010   #28
raydabruce

Windows 7 Ultimate x86 and Ubuntu Linux 9.10
 
 

Quote   Quote: Originally Posted by aem View Post
Quote   Quote: Originally Posted by raydabruce View Post
Quote   Quote: Originally Posted by aem View Post
Guys for my lappy, it was the Microsoft ACPI-Compliant Control Method Battery PnP device, as soon as i disabled this is Device Manager, the icons message just went away. My XP dualboot is fine so i disabled it on my W7.
That's fine for getting rid of the message but it won't correct the wrong values for battery capacity that Windows 7 has written to your battery's EEPROM chip.
Can you explain more on this value and where i can check it?
I don't know of any way to check it other than the usual way within Windows. It will report your charge capacity (original and current) with "powercfg.exe -energy -output [filename]." If your charge capacity is dropping fast, then you have a problem. Batteries should last anywhere from 1 to 5 years, depending on usage patterns, in my experience.
My System SpecsSystem Spec
08 Feb 2010   #29
snlu178

Windows 7
 
 

Pusspa

Go back into the power scheme and change the "critical battery" setting. That should correct it. I have left it alone with the "PC dying" feature for now to stop Win 7 from once again killing the battery.

FYI if you set setting back to normal Win 7 will just redo the "consider replacing your battery". If you leave the setting alone as I detailed, you get hours of battery life back...just dont let it put your PC to sleep when it thinks you are out of juice.
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08 Feb 2010   #30
aem

Windows 7 Ultimate 64Bit
 
 

Quote   Quote: Originally Posted by raydabruce View Post
Quote   Quote: Originally Posted by aem View Post
Quote   Quote: Originally Posted by raydabruce View Post

That's fine for getting rid of the message but it won't correct the wrong values for battery capacity that Windows 7 has written to your battery's EEPROM chip.
Can you explain more on this value and where i can check it?
I don't know of any way to check it other than the usual way within Windows. It will report your charge capacity (original and current) with "powercfg.exe -energy -output [filename]." If your charge capacity is dropping fast, then you have a problem. Batteries should last anywhere from 1 to 5 years, depending on usage patterns, in my experience.
The problem is not dropping fast, not that i time my battery life, it's the message of replacing battery.

My report came back with:

Both with power mains and battery only.
Battery:Analysis Success
Analysis was successful. No energy efficiency problems were found. No information was returned.

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 "Consider Replacing Your Battery"




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