ODYSSEY Extreme Series Marine Battery Model 34M-PC1500ST (Group 34 with tin-plated SAE posts, 3/8 inch positive and 5/16 inch negative thread SS stud terminals) Like an athlete that is both a sprinter and a long distance runner, the ODYSSEY Marine Dual Purpose battery has both massive starting power and amazing deep cycling capability - up to 400 cycles at 80% depth of discharge. With twice the overall power and three times the life of conventional marine batteries, this ODYSSEY 12 volt 68 Ah battery is ideal for trolling, starting, and for powering the many on-board electronic accessories common in today's boats and recreational vehicles.