MK Battery ES4-6 6 Volt (6V, 4.5AH) Although a wet/acid design is initially less expensive and can provide about10% more running time per charge than a sealed battery of equal size, a Wetlead/acid battery has a much shorter service life, requires regular maintenanceand poses a much higher safety risk because of potential battery acid contactand/or explosion. Our sealed battery, instead, provides an inherently safer,truly maintenance-free design. Our batteries provide a significantly longer life-averaging1 to 2 years or . . . Although a wet/acid design is initially less expensive and can provide about10% more running time per charge than a sealed battery of equal size, a Wetlead/acid battery has a much shorter service life, requires regular maintenanceand poses a much higher safety risk because of potential battery acid contactand/or explosion. Our sealed battery, instead, provides an inherently safer,truly maintenance-free design. Our batteries provide a significantly longer life-averaging1 to 2 years or longer when properly maintained. Our batteries are availablein models approved by major airlines and other public transportation providers. 2 6 4.5 2.76 1.85 4.21 1 Year SLA 1-2 days MK Battery No http://site.apexbattery.com/logos/mk battery.jpg New F1 / 1 M