Welcome to the forum.
I knew I wanted a battery right away so I measured my battery box and went to W*mart with my tape measure. I measured the batteries they had in stock so there was no question that what I bought would fit.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.