ST-550 American Bass Audio Stealth 550 | 55Ah AGM Battery | Maintenance-Free, Sealed Power for Car Audio & More

Description Specifications Up To 1500 Watt Amplifiers 12V AGM Battery,55 AH NOMINAL VOLTAGE 12V NOMINAL CAPACITY(20HR) 55.0AH APPROX WEIGHT Approx 16.2 kg (35.17lbs) TERMINAL T6 CONTAINER MATERIAL ABS MAX. DISCHARGE CURRENT 660A (5s) INTERNAL RESISTANCE APPROX Approx 7.5mΩ NOMINAL OPERATING TEMP. RANGE 25+3 C (77+5 F ) DIMENSION Length: 229+3mm (9.02 inches) Width: 138+2mm (5.43 inches) Container Height: 205+3mm (8.07 inches) Total Height (with Terminal): 211+3mm (8.31 inches) RATED CAPACITY 57.2 AH/2.86A: (20hr ,1.80V/cell,25 C/77 F) 55.0 AH/5.50A: (10hr ,1.80V/cell,25 C/77 F) 47.3 AH/9.46A: (5hr ,1.75V/cell,25 C/77 F) 42.9 AH/14.3A: (3hr ,1.75V/cell,25 C/77 F) 33.6 AH/33.6A: (1hr ,1.60V/cell,25 C/77 F) CAPACITY AFFECTED BY TEMPERATURE 40 C (104 F): 103% 25 C (77 F): 100% 0 C (32 F): 86% OPERATING TEMP.RANGE Discharge: -15~50 C (5~122 F) Charge: 0~40 C (32~104 F) Storage: -15~40 C (5~104 F) CYCLE USE Initial Charging Current less than 15.5A.Voltage 14.4V~15.0V at 25 C(77 F)Temp. Coefficient -30mV/ C  STANDBY USE No limit on Initial Charging Current Voltage 13.5V~13.8V at 25 C(77 F)Temp. Coefficient -20mV/ C SELF DISCHARGE Batteries may be stored for up to 6 months at 25 C(77 F) and then a freshening charge is required. For higher temperatures the time interval will be shorter. Support Specification Sheet (PDF)