Chosen Solution
Hi, was having trouble with an MBA 5,2— very poor battery endurance. Ordered a replacement batt from you and installed. For cal, charged to 100% + two hours, then started to run down to zero. Died after just a few hours, and now won’t charge at all. Reset SMC several times. MagSafe light is orange, coconutBattery sees all zeros, see attached. I tried to run hardware diagnostic (holding D at boot), but it boots into internet recovery, with or without option key. Then throws error “Cannot Load ‘EFI/Drivers/TestSupport.efi”. Any suggestions?
Untitled 1 Update (09/09/2021) Thanks for your volunteer support Dan! This Mac is not screen-shotting with normal keyboard commands, so attaching a photo of coconutBattery main window. Been sitting all night, shut down, with orange MagSafe light, and still the same.
To start with the micro-controller within the battery is not working properly. So you do need to replace the battery contact the Fixit store for a warranty exchange Contact iFixit Customer Support Also make sure your MagSafe charger is in good shape and the contact block on the system is clean and pins are not tarnished or pitted.
