No battery detected with Windows 7  

I've installed Windows 7 RC on my old Acer TravelMate 4001 notebook. Installation went fine, all drivers are working, but only one is missing - ACPI driver. In other words, Windows doesn't know, that there's a battery in the computer and that's quite a problem for a notebook. It's problem with drivers, not with the battery. If drivers are fine and battery us dead, there would be an icon in toolbar saying 'battery is dead'. But i got no icon, no advanced power options, no 'time reamining' indicator, nothing.
In windows XP everything was OK, but since I started using Window Vista and Windows 7 - no battery found and one unknown ACPI device in device manager.

I've searched for help many times on internet without any success, I'm asking here, maybe somebody experienced the same problem and found some solution. Thanks any advice :)

Orbital Shark said:

Hi Necroman,

If there is an 'Unknown' ACPI device in Device Manager has it got a yellow tag/exclaimation on it? If so try right-click then Update driver software to see if anything gets detected on Windows Update.

Hope this helps :)
Jeff

Already tried that, no suitable/working driver found, even online.

I am seeing a few drivers at the Acer website... but I do not see a 4001... I see a 4000 and a 4010...

acer website although the drivers listed for this laptop (4010) only shows for XP, no Vista.

Looking around online, it appears many of these Acer laptops have a custom driver setup only designed for the original OS it comes with which may explain why none are found for Vista or newer.

Well I've got the exact same problem (travelmate 4000 with radeon 9700). The system just don't see the battery. In the device manager there is an unknown device (yellow) that says Microsoft ACPI-Compliant Control Method Battery (code 28). I've tried almost everything (Drivermax, windows update, bunch of different drivers from the internet...) but nothing seems to work.

Guess we have to wait for MS to sort it out I don't like this option a bit:)
Maybe some hack or something...or try other manufacturer with very similar notebook specs...don't know...what about you guys?

What about acer upgrade kit? I'm downloading it right now:)

Yeah I know 4000 will not be supported - it's a shame. But maybe in the acer upgrade kit is the "holy" driver somewhere:) Don't know yet but I'll keep you posted.

Well I was able to install a driver for ACPI from asus:

Asus G60Vx Notebook ATK ACPI Driver 1043.2.31.105 for Windows 7 download for Windows 7 - Soft-Go.Com

Now it's not yellow, it's running absolutely fine BUT the battery is still not detected!

It's seems the problem is somewhere else - not in the acpi driver. But where?

Edit: btw there was nothing useful in the acer upgrade kit