Chosen Solution
I recently replaced my MBA’s battery. (Around a year ago with an iFixit battery). The OS says the battery is at 100%, but when the device is unplugged from power, it immediately shuts down. No battery indicator appears when I hold the power down for several seconds. This is a new issue, it worked fine before. I have reset PRAM, SMC, unplugged battery and made sure that it is seated correctly. I have attached photos of System Info. Please let me know if there are other troubleshooting steps I can take, or if the battery is shot.
Have you checked the driver/drivers for the iFixit battery that you used to replace your faulty one with? It is probably a software issue.
@cacciatore98762 - OK, if you pull the MagSafe charger connection now, tell us how long it stayed running (watch some YouTube vids). If it runs out in less than 2 hrs then you’ll need contact the iFixit store to get a replacement battery.
