@poemblaze The battery consists of multiple cells. If it is one of the cells that has failed it can show the maximum capacity of minus the failed cell (minus a little capacity loss normal over time). That's not a guarantee I might add but I'd say it's likely.
It sounds like you need to replace the battery. Also, if the battery (or any of it's housing) shows any physical expansion, take it immediately out of your house, it is a fire hazard. A lithium fire hazard which is really bad.
@poemblaze Sorry, I'm pedantic. It probably is why I want to write 😀
If the battery is removable, there are services that will replace the cells inside (sometimes you'll even end up with more capacity than you started with). Otherwise you'll have to crack open the laptop (or have someone knowledgeable do it) to replace it.
@poemblaze I don't know of any danger to continuing to use it though unless there is expansion evident.
Also, DO NOT PIERCE IT
Exposing lithium to oxygen is bad, real bad. If there is any physical expansion or the battery is pierced, this can happen: https://www.youtube.com/watch?v=oieH2wwDGzo
@poemblaze I don't mean to be alarming and frankly, I ran on a laptop for months with a failed cell. I also don't want anyone thinking they are like the batteries we all grew up with 😉