Windows 10: Laptop battery capacity decreased 75% within 5 days without any usage?

My windows 10 laptop battery capacity was 40,263mWh on 25Dec2022 then it suddenly decreased to 19,437mWh. Now on 1st Jan 2023 it decreased to 10,742mWh. 40,263mWh to 10,742mwh. Where is fault?

:)

 

Battery full charge capacity is decreasing

Hello there,

There is already a question in Microsoft forum but I can't reply it because it's locked:

Redirecting

My issue is very similiar, the only difference is that my laptop is Asus notebook A541UJ.

Here is the thing: I already bought 2 new batteries and within 5-6months of usage, the capacity goes from 28 000 kWh to like 6 000 kWh, so, my guess now is that the Windows Operating System is not dealing very well with the batteries. One of my latest battery report shows that I'm reaching 431% of battery capacity. Probably because I changed the battery and it considers the "100% full charge capacity" as 7 000 kWh and not the correct 28 000kWh (of the new battery).

Thank you for the attention

Filipe Silva

 

Full charge capacity of battery decreased

Repeat the steps Dave suggest you other three times.

Also you can uninstall and reinstall battery from device manager before each charge. You can do that:

1. Press WINDOWS + X

2. Click on "Device Manager"

3. Click on "Battery"

4. Right click on your battery

5. Click on "Uninstall device"

6. Repeat steps 4 and 5 for each element on battery list

7. Click on "Detects Hardware change" (monitor icon)

 

Battery full charge capacity decreased?





As you can probably see from the above image, my battery's full charge capacity has been decreased. Even though I just bought this laptop like 3 months ago, the laptops full charge capacity has been decreased by a huge amount like 5000mWh. I don't know what is causing this I have three questions...

i) What causes a battery to lose its Full Charge Capacity?

ii) Can a full charge capacity be increased (reversed) by using it the right way again?

iii) How can I save my battery from losing it's full charge capacity? Will using it plugged into the charger help it not get decreased?