MBP Mid 2015 Battery Replacment - No Battery Power

Thx for responding, @mayer! Yes, I'd like to use CB for battery info, however as soon as I enter my password to get into my profile, it reboots. I can't open a browser to download / install Coconut Battery since the reboot is immediate - I can't even see the dock paint before the abnormal reboot occurs.

I just booted into diagnostic mode and ran a test and am getting this reference code:

https://support.apple.com/en-us/HT203747

PPT006

The battery requires service. The battery is not functioning normally, though you may not notice a change in its behavior or the amount of charge it holds. You can continue to use your battery before it’s checked without harming your computer.

I can boot via USB3 High Sierra installer, however when installing macOS to an external drive (through the other USB3 port), the install gets to 1/2-way point, then abnormally reboots in the middle of the install. If I had a bad drive, how would that apply in this scenario when I'm by-passing it altogether just using external disks (using 'option'):

https://support.apple.com/en-us/HT202796

Tried internet recovery:

https://support.apple.com/en-us/HT204904

After progress bar completes on the spinning globe, abnormal reboot occurs and I'm unable to re-install macOS from Apple's internet servers.

Could it be a logic board issue created the battery problem I had and there's still a hardware issues? I ran diagnostic again, however still receiving PPT006 cause code.

I'd think if there was a logic board issue or some other hardware problem it would show up in diagnostic results, however possible that logic board problem results in battery communication issues even though SMC has been reset multiple times?

Has this problem been solved? I changed the battery yesterday and seem to have similar problems.

Still in-progress....I took my MacBook Pro to the Apple store to diagnose. They told me it's a logic board issue, but that they needed a Tier 4 repair center to determine if there were any other failed components, so they shipped it off (with my ok) to a repair center. Then they give me the choice to repair (at a cost) of a couple of different possible scenarios, or they send back as-is and iFixit myself.

Closing the loop on this issue - ended up being the battery. For some reason the replacement batteries I received from iFixIt didn’t work and were causing abnormal reboots as mentioned above. The logic board was NOT replaced.