11-09-2009 05:19 AM
I tried disabling the Power Manager in services, didn't change anything for me. Also, even tried uninstalling ThinkVantage Power Manager, but that didn't change anything either, Windows still only reporting 6 hours of battery life on my 9-Cell in Power Saving Mode. I still have roughly 95% of my battery's original capacity... I should at least be getting 7 hours. Using the Windows Power settings though does seem nicer.
Still waiting on driver updates Lenovo.
11-09-2009 12:35 PM
Powermanager always worked for me in Win XP but in Win 7 .... it seems to be broken or maybe there are some bad interactions with the Win 7 powermanagement.
11-12-2009 05:41 AM
So there are quite a few reviews out now about Windows 7 and battery life with netbooks.
I'm guessing this is a Windows 7 problem, although anything Lenovo can do to help with more efficient drivers would be great too. Hopefully Microsoft will release some kind of SP2 or something to improve battery life.
11-12-2009 07:59 AM
yes, but that's about the difference in battery life between XP and 7 (and Vista actually, since there hasn't been much change there...)
what we are experiencing here are a few very specific issues that have nothing to do with the general power management of the OS
11-14-2009 06:03 AM
I have experienced something interesting lately.... when I had the Power manager GUI open, I immediately lost nearly one hour.... when I checked Taskmanager..... pwmgui.exe uses 50% of my CPU!
But with switching several times between descrete and internal grafics and finally staying on internal, plus no USB-drives attached....no usb-mouse connected.... and dimming the display to 3-4 stripes i nearly had 5 hours of "up-time" which is about the same as on vista...... considering that my battery wore down from 84 to 69 Wh in one year....
Model - W500 - 4063-A45
11-14-2009 10:06 AM
dixis wrote:...considering that my battery wore down from 84 to 69 Wh in one year....
did you try a battery gauge reset on the battery maintenance screen already? I was down to 72 after 6 months, did a reset and it's back to 80, which is pretty good =)
P.S.: the fact that the PWM-GUI uses a lot of CPU (for no appearent reason...) is well known I think... nothing too major though since you normally don't have it open that much...
11-14-2009 01:48 PM - edited 11-14-2009 01:54 PM
I'm having similar battery life problems with an SL500 - ~25W power draw instead of the usual 16W under XP... not really acceptable. in my case, removing the Power Manager didn't help
-edit- Win7 Professional x64, BTW.