Chosen Solution
I have purchased and successfully installed a new mid-2014 battery, seemingly with no errors or broken parts. several times I look up and it has dropped its charge approximately 50% in one instant, and then needs to recharge all the way back up. to the best of my knowledge, I have calibrated! charged up >, drained over night> recharged Update (01/20/2020)
results
Let’s take a look at the battery with a better tools. Please download and run Coconut Battery and post your results. https://coconut-flavour.com/coconutbatte…