Took the old battery to Wal-Mart, they said it had a bad cell. Got the Maxx-H7 (94R) touted in this thread
http://986forum.com/forums/performance-technical-chat/36071-986-battery-group-2.html, dropped it in and it started right up. All seems well so far.
Very relieved that's all it appears to have been and really appreciate everyone's help here.
Thank you.