New iFixit Battery is Recognized & Charging, then it isn't.
Here’s a run-down of everything that’s happened so far. Please help—I need my MBP to work!
Just bought and installed a new iFixit battery last night for a mid-2012 MBP unibody. Installation went fine (other than having some trouble getting the battery screws out, but eventually that worked out too).
Turned MBP on and battery was instantly recognized and began charging. Success! Or so I thought. Left machine on charger all night and planned on re-calibrating in the morning.
Woke up and went straight to computer. I can’t remember what the charge was when I woke the machine up, but I do recall that my external hard drives all showed “not ejected properly” errors. Thinking it was an issue with my USB hub, I unplugged the AC adapter to begin draining the battery as part of calibration. The MBP died almost instantly, if not instantly. Plugged AC adapter back in and re-booted computer.
Once rebooted, the battery meter showed that charging had stopped at 72%. Opened CoconutBattery and found all the stats to be at 0%. Closed CoconutBattery, checked power settings, then re-opened CoconutBattery and the app crashed. This suggests to me that something is screwy with the battery such that it’s causing CoconutBattery to panic and close itself.
Downloaded BatteryHealth2 from App Store as a replacement for CoconutBattery. BatteryHealth2 showed the same stats (72% charge, 0% health, 0 mAh charge, etc.).
Researched how to reset PRAM and SMC (because I forgot how to do it after a few years) and reset both, PRAM first and SMC second.
Restarted machine and voila! The battery is recognized again and resumes charging! All done, right?!
Wrong. Battery charges up to 97%, then the same issue re-occurs. Charging freezes, BatteryHealth2 stats are 0%/0 mAh, etc.
Here’s a screen-grab:
Interestingly, BatteryHealth2 shows an age of 7.1 months, which seems reasonable—almost as if it knows there’s a “young” battery inside, but unable to determine anything else about its health or current charge.
Anyway, having now reset the PRAM, reset the SMC, and checked two different battery management apps, what are the next steps? I’ll be leaving this on the charger because I’ve got work to do today and the only way this machine stays on is if I leave it plugged into the wall. All your help is appreciated—I’d buy you all a round if I could!
I did a second, immediately followed by a third, SMC reset. The battery is recognized/alive/whatever again, at least for now. Not sure if this changes things, but here’s a screen cap of BatteryHealth2 with a working battery:
Thanks for your continued help.
After about 5 minutes, the battery “died” again.
Mayer asked me to reinstall the old, original battery and post CoconutBattery screencaps. Ask and ye shall receive. Note, I did not reset PRAM or the SMC. It just worked immediately. Does this tell you anything? Because I’m really at a loss.
*Edit: Fixed typos, nothing substantive.
*Edit 2: Added update
*Edit 3: Added update
*Edit 4: Added update
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