DEKA Unigy 1 200AH Front Terminal Sealed Lead Acid TELCO Batteries use exclusive IPF technology optimizing power capacity, cell consistancy and long term reliability. Spcae saving Absorbed Glass Mat (AGM) construction allows a -48VDC string to fit in standard 23" telco rack systems. The quality standard for long term reliability in all wireleine and wireless carrier application, DEKA has the best reputation in the industry as the design life battery technology leader. AMAZING 1200AH at -48VDC in a single 23" rack system!!