iFixIt batteries do not work if you are running OS 10.11.2. Tried 2 iFixIt batteries and received guidance from iFixIt customer support.... Same result, it didn't work. Just spend a few dollars more and take it to an Apple Store.
I think you are SOL. I had same problem a few days ago. I have attempted everything I could find from online resources. Bottom Line: ship it to an Apple authorized repair shop or an Apple Store. Battery replacement Cost is now only $130, which isn't much more than iFixIt cost.
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