38Ah Group 51 Battery
Group 51 batteries (and Group 51R) are a popular BCI group size. It can be overwhelming as you attempt to compare and decide what is the best brand and style for your application. Generally speaking these batteries will range between 36 amp hour (Ah) and 45Ah, 450 cold cranking amps (CCA) and 500 CCA and 60 reserve capacity (RC) and 75 RC. It depends on whether it is a thick plate deep cycle or thin plate stop/start battery or a dual purpose combination. The dimensions should be roughly 9.3 x 5.0 x 8.75 inches.