The Yuasa Ultra Extended Life series of Solar Valve Regulated Lead Acid (VRLA) batteries is a sealed VRLA battery that uses advanced plate technology construction. The unique construction and special separators prevent electrolyte leakage when the battery is mounted either vertically or horizontally. The gas recombination system eliminates the need for topping up of water for electrolytes. The extra heavy duty grids are made from unique lead-calcium alloys that provide high resistance against corrosion. These features, together with a special paste

formulation, provide a long and reliable service life for shallow cyclic applications normally encountered in solar powered systems.