I recently ordered a new battery for my MacBook Air 11” 1.6 Core I5 model A1465 ECM 2924. I installed the battery as per your directions. It charged for just over 2 hours and I then let it charge an additional 2 hours. I was not able to get it to power on. I’ve tried a different power supply from my wife’s MacBook Air and no change. I tried a Power Cycle still not turning on. Also tried SMC Reset to no avail.