12 volt AGM deep cycle SLA group 31 battery Replaces and upgrades your goal zero yeti 1250 battery (the SLR125 fits inside your YETI1250) Military grade custom made plates Designed for 99% recombination capabilities; no dangerous fumes or gases; float service life span of 8 to 10 years The SLR125 is a 125Ah AGM battery, an upgrade to a 100Ah battery. Increase your battery capacity with a VMAX SLR125. The SLR125 is the same size as the 100AH group 31 batteries. Vmaxtanks specializes in the manufacturing of high quality AGM deep cycle batteries. These batteries offer superior performance and 8-10 years life span in float mode.