Chosen Solution
Hi! I just changed the battery and installed CoconutBattery. I was in the middle of calibrating (at least, I think it was calibrating: it was the process of fully charging, then let it fully discharge, and charge it again). As soon as I unplugged the power, the charge jumped from 100% to 80% and Coconut shows Battery failure. Did I got a faulty battery? Or is there something I could do like resetting SMC?
(I apologize for my bad English: it’s not my native language and I guess I made a lot of awful mistakes :))
Once in a while I get this issue with new batteries. Try at least 5 cycles of full charge and discharge and see whether the issue will go away.
