it last max 2h with like normal usage browsing and so on, but if i start some more performance taking program it can go down to around 40 minCost to replace the battery is dependant on which country you're in and should be done by Apple, third party batteries are notoriously shoddy.
Since you didn't mention typical usage and the amount of time your battery actually lasts (not the estimate by the computer, but the actual, true time), your question is next to impossible to answer.
With that said, battery health should not be this low with that little cycling.
I bought this macbook pro 2013 2nd hand and after a while i noticed that the battery performance decreased quite fast, so i wonder if this is normal and otherwise how much does it cost to replace the battery? View attachment 636864
Is there anyway to see if i got a 3rd party battery?I'd guess its a crap 3rd party battery, no way is that capacity decline normal, it'd be useless in a month.