Contacted seller, he asked to, once again, drain the battery completely and try again.
Giving him the benefit of the doubt, I did.
I unplugged it around 0630 this morning, and my 30 min drive to work, listening to pandora (having set data to 3g only) phone was down to 88%.
Noon was down to 55%. Regular use. Nothing special. GSAM reported no irregularities. I put samsung battery back in to ensure it wasn't my phone. Phone since 1300 has gone down 6% with normal use and 4g on with pandora.
DONT BUY THIS BATTERY. YOU WILL BE SAD. Returning to seller today.
Hitting that "Thanks" Button never hurts.