Battery not detected Aspire 3820

"Battery not detected" using new battery. I have tried several brands of new batteries but none are detected. The old battery is worn out and only holds 40 minutes and the "battery power level meter" is not measuring the old one properly. For the new batteries I have tried all fixes I know: depleting, restarting, plugging in and out, uninstalling and re-installing "Microsoft ACPI-Compliant Control Method Battery. Also tried to reach BIOS and such settings, but after updating to Win10 two years ago there is no way to override Windows using F2, F3 or F8 or what ever keys. Smiley Sad

Any ideas? Much appreciated.

Accepted answers

JackE

You said earlier>>>I've replaced the battery once before, a few years ago. That was also failing until I had to go back to Acer and make sure to buy an exact copy of the original battery (Double the price).>>>You could not expect to connect that to the change of battery, but it did not stop until I got the exact original Acer battery.>>>

I think we have 2 issues, either or both of which ***might*** be responsible. (1) Win10 is NOT fully backward-compatible with your mainboard's chipset. Not unusual for older laptops. (2) The old & new embedded battery controllers are different. Not unusual either.

So we seem to be forced to try two undesirable things because neither is a guaranteed fix. (1) Re-set your 3820 to a factory-fresh Win7 state. (2) Keep Win10 and continue to look for an exact battery replacement.

Jack E/NJ

All comments

JackE

>>>I don't want to roll back to previous Win, whatever version that was, can't remember. Win10 upgrade solved some other issues and made this old laptop happy again.>>>

The original factory-fresh Win7 version should still be in a hidden ACER partition on your hard drive. Whatever ***other*** Win7 issues that you had before besides the battery, should be fixed with a factory-fresh re-set using the ALT+F10 boot method from this hidden ACER partition if it hasn't been wiped out by the Win10 installation. Jack E/NJ

Ginalaw

TomasK said:

No luck. But there are two battery drivers. The "Microsoft ACPI-compliant Control Method Battery" I've tried to mess with several times over the past week, since it is a common advice found on internet. But the other driver is named "Microsoft AC Adapter", and since no one ever has mentioned that one I have not dared touching it. Should I uninstall both at the same time, and restart etc?

Thanks for helping me! /Tomas
(PS. I've replaced the battery once before, a few years ago. That was also failing until I had to go back to Acer and make sure to buy an exact copy of the original battery (Double the price). But now its been discontinued by Acer, so I have to find another maker. At that replacement the battery bugged in another way making the laptop behave in mysterious ways. You could not expect to connect that to the change of battery, but it did not stop until I got the exact original Acer battery.)