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Your CoconutBattery captures are showing the charging logic on the main logic board is damaged! I’m suspecting the charger did you in :-[ You’ll need to get your systems logic board repaired or you can just replace it MacBook Air 13" Mid 2012 Logic Board Replacement. Given its age it might be time to look at getting a newer system. Even still we still have an elephant in the room! Apple for many a year fought hard to prevent letting knockoff chargers be imported into the country, sadly, they have now stopped as such the marketplace is now flooded with junk! These knockoffs will harm your system! You’ll need to get a REAL Apple unit Apple 45W MagSafe Power Adapter for MacBook Air If you get your system fixed you’ll want to get a new unit so you don’t damage it again. ● Don’t Replace Your MacBook Charger With a Cheap Knockoff ● OEM MagSafe Chargers vs Cheap Imposters: Teardown for Truth ● Lacking safety features, cheap MacBook chargers create big sparks ● FAKE Magsafe MacBook Chargers on eBay - Watch before buying a Mac Charger
