Chosen Solution
I have a MacBook Pro mid 2015 Retina 15" and some months ago realized it’s battery must have been swelling after reading cases on this site. I thought that my external device cable connectors were somehow blocking the screen from closing properly. What a nut? So I instinctively, instead of always keeping it running and just putting it to sleep at night, when I do the same, I started 3 months ago to power down nightly. The swelling subsided immediately and still is. Is my MacBook Pro’s battery out of harms way, or should I be concerned?
Sadly, you’re not out of the woods yet! Just because the swelling caused by charging is not as bad the problem doesn’t go away. For now don’t use your system or charge it! Leave it off! You need to replace the battery but in this state it can be dangerous! Leaving the system in this state could finally fail fully causing both smoke and potentially start a fire! Make sure you place your system away from anything flammable and with ventilation options. If you are planning on doing this your self do it outside and wear cotton cloths and have a fire extinguisher nearby working away from anything flammable. Here’s the needed part MacBook Pro 15" Retina (Mid 2015) Battery and here’s the guide MacBook Pro 15" Retina Display Mid 2015 Battery Replacement You may want to let someone with more experience working on Macs do this.
