Chosen Solution
I purchased a replacement battery for my MacBook Air and followed the steps for installation and calibration. Now when I try to reboot the computer, I get a battery level warning icon and the computer won’t turn on unless the power cable is plugged in, regardless of how charged the battery is. Once the computer boots up, I can disconnect the power cord and everything works fine. It’s almost like it needs a jump start to boot up. Any idea what might be causing this? Update (02/25/2022) Here’s the screen grab from coconut battery. The percentage matches what my MacBook Air says. I’m going to try the calibration process again, but this time leave the computer dead for at least 5 hours after it shuts off.
Update (02/26/2022) Here’s the screen grab with the battery fully charged. I let the computer drain and shut off last night, then left dead and unplugged overnight. I charged it back to 100% this morning. I haven’t tried shutting the computer down and restarting it without the power cord yet. That will be my next step.
Your batteries charge is quite low! Shut down your system, plug in your MagSafe charger the connector LED should turn Amber, let it charger for a good 10 hours. Then take a fresh snapshot and post it so I can see it Update (02/26/2022) Your snapshot is still showing the original battery info. If you got a new battery its data of manufacture should show up. Lets give your system a hard reset. Carefully showdown and disconnect the battery fully. Now with the system on its side with the MagSafe socket straight up and nothing connected, press the power button holding it for a good 15 sec’s to allow the logic board to fully drain. Then plug in the MagSafe cord only the system should spontaneously start, let it fully boot up and then shut the system down. Now reconnect the battery and restart, give it a few minutes and open CoconutBattery it should now show a different manufacture date and likely the Cycle count will also be different. Post a fresh snapshot when you can.
