PowerStar 6V 4AH for (SBS640) Maintenance-free Battery - 2 Year Warranty Completely maintenance-free design and function and there is no need to fill with electrolyte L- 2.76 W- 1.89 H- 3.98 With its sealed design, gases recycle internally during operation or charging Increased cold cranking performance resulting in better, more consistent starts in all kinds of weather PowerStar Brand and 2 Year Warranty