I have a 2014 Macbook Air 13" Air works fine with AC Power, -Battery is healthy, - -less than 100 charge cycle, -its showing 100% charged. However when I unplug the AC Power, the shutdown. so I tried -Reset SMC -Reset Pram even -Disconnect battery for 2HR -Reset SMC -Reset Pram Still not working with battery. So I bough a battery from Ebay, tested the battery on other Air works fine. placed the battery in, its showing 70% (New out of box), even its charging to 100% unplug the ACPower.... Shutdown again. Anyone got idea???