This state-of-the-art lead-acid battery is the valve-regulated type - sometimes called sealed or maintenance-free which fixes the acid electrolyte in an absorptive fiberglass mat, The advantage of this design is that the battery needs no water additions can be operated in any position and can be used in close proximity to people and sensitive equipment, This new technology provides the following benefits compared to old technology wet batteries:, Maintenance-free, Sealed no leak design, Higher cranking amps, Lower self discharge, Greater vibration resistance, Heavy duty no corrosion terminals, Electrolyte is suspended in fiberglass mat separators which act as absorbent sponges, Will not leak even in an upside down position, Replaces OEM Model No, YTX20HL-BS, Chemistry Sealed Lead Acid (AGM SLA) SKU: UNV163