So I just replaced the battery of my MacBook Pro 15 Inch Retina 2015 version.
Since then the computer is REALLY slow.
Right after I replaced the battery, I did an SMC reset....
The Battery I bought is definitely original, I bought it through special connections in Shenzhen so its not a cheap crap battery.
Does someone have a solution to this or does someone had this problem before?
Please help <3