Battery meter fluctuates

I've seen this before. It's one of 3 possibilities.
1 - The battery is dying, might need to be replaced.
2 - Another piece of hardware is spiking and possibly overheating. Yes, Windows 7 runs great but it also requires additional resources. More processing, more heat, more power consumption.
3 - Not related to the battery directly but possibly the power supply. The battery is the first place most would think to look at - myself included. I think it's indicative of another fault with hardware. Possibly the sensor via ACPI is faulty and while it's potentially a driver problem, it's better to be safe than sorry.

If you're handy with a volt meter, check the battery. Since it's fine on AC like you said, it's a good place to start. Otherwise, try using Vista drivers for your mobo and especially ACPI.

And don't get electrocuted.

He's dual booting with no such issues in Vista.

I'd say that rules out (almost positively) issues with either the battery or Power supply, as those should be occurring across the board if it were either....

Cyberg - I am willing to bet it is due to the drivers not being correct / working correctly in 7 - contact your OEM for any advice they may have and / or possible Beta drivers for 7.

I have a similar problem. I have seen my meter reading 0% on a full charge or read some odd % when we know (wife and I) that its more or less. I think I remember this same kind of issue with vista on some laptops.

cyberg18 said:

I tried to rollback battery and ACPI drivers to the VISTA version, but I get an error message concerning reading access (even if I'm logged as an adminstrator with full privileges). Even tried overwriting them on the W7 drive while booting up on VISTA. Any ideas ?

THX

CyberG18

You might have to take ownership to roll back to vista version. After roll back I dont know if your ownership (instead of trusted installer) will cause a problem. Some one out there must know

Hope this helped somewhat

Ken