ULTRA MAX 12V 20AH (Replace 17AH 18AH 19AH 21AH 22AH) Rechargeable GEL Battery
Ultra Max NPG20-12 AGM/GEL Battery 12V 20AH (Replace 12V 17AH, 12V 18AH, 12V 19AH, 12V 21AH, 12V 22AH). (12V 20Ah). AGM are 'Absorbed Glass Mat' The Plates are wrapped in the Mat and electrolyte is absorbed into it - protecting the plates.