Key Features
- Group 51R starting battery: The Interstate M-51R is a 12-volt flooded Group 51R battery rated for 425 cold-cranking amps and 530 cranking amps, clarifying its starting-power class.
- Reserve capacity and fit check: It provides 75 minutes of reserve capacity at a 25-amp draw and uses top-post terminals, so confirm Group 51R fit and terminal layout before replacement.