battery indicator aspire v7

My battery indicator seems to be showing incorrect readings. When I get to about 16% battery, it will drop to 5%. It will not even show the battery critical warning, it just goes to 5%.

I already tried reinstalling windows to factory, same issue. Also installed Linux to see if it was a specific problem with Windows, same issue.

I ran powercfg to see what was going on and see this for my battery;

Battery ID	17266SANYOAP13B3K
Manufacturer	SANYO
Serial Number	17266
Chemistry	LION
Long Term	1
Sealed	0
Design Capacity	53400
Last Full Charge	55455

For some reason, it is showing a full charge of more than design capacity. Could this be why it incorrectly thinks it has more battery, and then quickly readjusts to 5%? I tried recalibrating (three times) the battery by completely draining and then completely charging and have the same problem

Also, I found that if I overcharge (leave it plugged in after fully-charged light comes on) then this problem disappears for that discharge cycle, but will return if I don't overcharge it for the next cycle. It seems to think it's fully charged too early when it's actually not!

Honestly, I'm hoping there is a way to fix this without having to replace the battery, since it's not removeable for this model so I would have to send it in for warranty replacement. This laptop is only about 6 months old.

Any advice?

Accepted answers

All comments

philetus

The Power Manager isn't exact. It's more like a guestimate on how good your battery is. If you're getting average battery life, you're probably ok. You can reinstall the power manager and see if it helps.

Jfmartel

How do you reinstall it?

philetus

Go to Control Panel/ Programs and Features.

Jfmartel

Which power manager are you referring to? I don't see any sort of power management program installed? I'm referring to the built-in windows battery indicator acting incorrectly. I've already tried reinstalling windows as a whole and haven't seen a difference

philetus

I was refering to the Acer power manager software.

Jfmartel

I actually uninstalled that program when I purchased the laptop. I tried reinstalling it but I'm still having the issue.

At this point I think its just an issue with the firmware in the battery. I will try and find time to send the laptop in for warranty battery replacement to see if it solves the issue

Thank you for your replies thus far,

Jfmartel

So it's been nearly a year now since I purchased this laptop. I finally got around to submitting a warranty claim on the laptop. They replaced the battery and sent it back, and the issue is exactly the same as before. I am not sure what to do at this point.