Macbook battery

[Jurgenss]

I have a macbook pro mid2010 that I changed the battery and logic board a few moths ago, I have an issue with the battery that after a full charge and removing the charger plug the battery suddenly drops below 80% runs normal till about 50% and then the macbook suddenly shutdown down and don’t turn up again until I plug the charger again, tried reseting smc and calibrating the battery with no result, and help pls?

 

[Audit13]

Where did you get the battery? If it came from Apple, take it back to the Apple store for diagnosis?

 

[Jurgenss]

I changed the battery and logic board nearly a year ago now, and it was from a third party store, I would buy a new battery but don’t know if maybe there something else to the problem

 

[Fishrrman]

Most likely a bad or flaky battery.
Buying replacement batteries can be a guessing game:
Will you get a good one? Or....?

 

[Audit13]

What does coconut battery say?

I think it's the battery as well.

 

[Jurgenss]

Is it normal that full charge capacity is greater then design capacity?

 

[Audit13]

Is it normal that full charge capacity is greater then design capacity?

Yes, I've seen this happen with a third party MacBook Air battery I purchased from Amazon.

The battery looks fine but it could still be a battery problem.