With a capacity range of 17AH to 21AH, these batteries have been tested and proven to provide great performance. 2(PAIR) X YUASA REC22-12 SEALED LEAD ACID Battery 12V 22AH (Replace 12V 17AH, 12V 18AH, 12V 19AH, 12V 20AH, 12V 21AH).