2(Pair)x 12V 18AH ULTRA MAX GEL Sealed Rechargeable Battery Standby & Cyclic use
2(PAIR) X Ultra Max NPG18-12 AGM/GEL Battery 12V 18AH (Replace 12V 17AH, 12V 19AH, 12V 20AH, 12V 21AH, 12V 22AH). (12V 18Ah). For standby power this range has a nominal 5 - 8 year life. GEL BATTERY. ULTRA MAX CODE: NPG18-12.