Not 100% sure but I think this is still a battery issue on these specific models, A1398, they need a lot of energy and these batteries cant cope when they get old on these models, if you try to use any macbook models without battery, you will notice the macbook being really slow if you are even able to boot it fully into MacOS, the A1398 2015 models will not fully boot into MacOS without battery at all, it will start booting then restart into a bootloop, not a good design. Is battery calibration even a thing on MacBooks? Repaired the disk in Disk Utility (Recovery mode)Īny suggestions to try and address the problem? I can’t really understand whether this is a hardware or a software problem! The best part is that as soon as I plug it in, the mac suddenly turns on and gets back to the point I had left it before shutdown (no request of password, no loading screens…) and I can unplug it and it will work normally, with no problem whatsoever. Since a couple of weeks ago, though, my mac started to have a strange behaviour when I turn it on and the battery is lower than 50%: it boots up, I enter the password and it loads correctly, but after 20 seconds it shuts off, displaying the “dead battery” sign. However the battery didn’t present any problem besides reduced battery life (I can get at most 3 hrs), which is not a big deal for me. I own a mid 2014 15” MBP with the original battery (it now has about 1100 cycles, with 70% health, as displayed by Coconut Battery) I used to leave it plugged in pretty much all of its life. This worked for my 2017 MacBook Pro 13” (two thunderbolt ports) that only had 152 charges on the battery. I knew steps 2 through 5 worked because my MacBook would shut off at 62% BUT after the third reset it finally jumped to 6% and I was able to run it unplugged for a ridiculously time. Use an app like Coconut Battery to see if things match.

Plug in the MacBook and let it fully charge to 100%, disable anything that prevents this from happening.

Attempt to turn on the MacBook, IF IT DOES NOT TURN ON PROCEED TO STEP 9.

LEAVE THE MACBOOK ALONE FOR A MINIMUM OF 5 HOURS!!!.

Repeat steps 2 through 4 until it stays dead (I had to do this 5 times before it was officially dead).Hold shift+control+option+power for 10 seconds (resets the SMC).UNPLUG THE MACBOOK AND LEAVE IT UNPLUGGED UNTIL STEP 9.I solved my issue by doing the following:

New macbook 2015 charger