Heavy duty AGM battery made with special plates and top of the line plate separators giving these batteries superior performance and unmatched deep cycle capabilities. AGM Electrolyte Suspension System. Custom Built Military Grade Alloys. Fast Charge Delivery Capabilities. Extremely Low Self Discharge Rate. Safe to use in small areas; no spills, no toxic fumes. Extreme Vibrations, Heat and Weather resistant. Sealed Non-Spillable Non Hazardous Construction. Maximum Power Density and Deep Cycle Capabilities. VMAX batteries have 99% gas recombination capabilities. Maintenance free Operation – Other than the periodical surface cleaning and tightening posts.