Chosen Solution
I have a macbook pro mid2010 that I changed the battery and logic board about a year
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?
Data showed by Coconut battery are too good to be true, no battery stays perfect after 122 charge cycles, even above design capacity in this case. The two possible options are a faulty SMC circuitry or a faulty battery logic. Unless you are willing to test component by component all SMC charging related parts the only way to know what’s wrong of the two is to find an alternative battery.
