I have been running a sketchy "FVP" (might as well be "WTF") brand battery that was in the car when I bought it last year. Things have been fine since I have kept the car on a battery tender, but during an audio tinkering episode the battery went completely flat in a much shorter than expected amount of time. I was forced to wheel out the big ass commercial battery service unit my Dad gave me over 25 years ago; the FVP was successfully resurrected, but time for a new battery. I went with a Super Start 48PLT AGM from O' Reilly Auto:

OReilly Super Start 48PLT.png

Contrast and compare:

Battery Swap.png

The Super Start fits perfectly, including the vent line elbow:

SuperStart Platinum Installed.png