Chosen Solution
So, I’ve been fixing up an old MacBook, did some upgrading, replaced the battery with one from iFixit, etc… I calibrated the battery from the usual procedure, charged it, waited 2 hours, left it to die, charged it again, and everything worked great. A little bit after that, I guess I made the mistake of leaving it for a few days, resulting in it dying. I believe this actually made it recalibrate the battery, in a very bad way. I tried to power it on a few days later, no power, no response, nothing. Hooked up the charger, it powered on, battery lights came on this time, and it was 100% charged… Pulled the charger out - instant shut off. And that’s the basics of it, and my hunch is - it’s somehow recalibrated the 0% flag to be 100% charged. So I thought - just recalibrate it? Well you can’t - it won’t charge it any more since it think it’s already charged, and you can’t drain it because it dies as soon as power is pulled. And I’ve already left it for several days for it to be fully dead anyway, so it’s just stuck dead. Any help or ideas on how to recalibrate it would be appreciated. Also the condition is “replace now,” but the cycle count is 7. I did some research and the replace now condition on a new battery is a problem with an improper calibration, resulting in the same conclusion as before. Thanks, Pyrotex7 Update (06/13/2021) (Response to Dan, he asked for a picture of coconut battery): Here’s the report from CoconutBattery -
Ok, after a few weeks, I got a replacement battery from iFixit, tried it, working great! Problem solved!
