Electrical Problem.
 

So yesterday I'm leaving work, and my car will die if i get off the gas before its warmed up, so i'm sitting there, holding the rpms at about 2k, letting it warm up, and i accidentally got off of the gas for a few and it died. I had wipers, blowers and lights on since it was nighttime and raining, and when i went to start the car again, it didn't have the battery power to. So i turned everything off, and couldnt get it. My buddy jumped me and i made it about 1.5 miles before my car started coasting. Tried to jump it, and it wouldn't get enough of a charge to start, took the battery to autozone, it charged and tested good. Put it back in today, my hooked it up to some jumper cables, and my SAFC-2 read 13.8 volts. headlights work fine, but once i try to start, it just cuts out, so i'm thinking it might not be the battery or the alternator...but what is it?

Id check the wiring to the starter itself, all the main large wiring from the battery to the alternator, and starter.

main relay perhaps?

Hmm, not sure. Never had the problem, just general auto diagnosis.