1 Battery has failed prematurely
I purchased a Macbook Air replacement battery from iFixit in July 2019 and calibrated it according to the instructions after installing it myself.
In less than a year the battery started dying when showing 95% or more charge. I wrote to iFixit to report the problem, but they made no recommendations and didn’t offer to replace it.
I’m now at the point of getting a new computer, but would still like to be able to use this one on the battery without having to get another new battery. Is there any chance that I can revive this battery? Is there any chance that iFixit might replace it under warranty at this late point?
I’m a little steamed at them because I payed twice what I could have elsewhere, believing that I’d be getting a good product. My wife ordered a battery from the cheapest place on eBay and has had no such problems with hers. Thank you.
Update (12/14/2021)
I've got Coconut battery and have looked at it. Here it is for your viewing enjoyment. Last night I left a youtube video streaming to try and drain the battery. When I restarted it this morning it was only down to 77% - I would expect it to drain to near zero.
crwdns2934109:0crwdne2934109:0
329 
970 
Let’s get a better view of things, install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see Adding images to an existing question
crwdns2934271:0crwdnd2934271:0 Dan crwdne2934271:0
it might not be a battery problem, if you have a multimeter, try measuring the voltage of the cells when the battery is discharged and when it is charged.
crwdns2934271:0crwdnd2934271:0 Brayden S crwdne2934271:0