Yeah, that was definitely a low battery. My battery could run a high power stereo system for 5 hours but couldn't handle the key being in for 6.
I dont think the battery has quite recovered yet so now when I go to events I swap it out with a 560(?) CCA deep cycle RV/Boat battery and that thing works REALLY well. Not sure if it would be good to use a deep cycle for my truck battery long term though.