2(PAIR) X YUASA REC22-12 SEALED LEAD ACID Battery 12V 22AH (Replace 12V 17AH, 12V 18AH, 12V 19AH, 12V 20AH, 12V 21AH). (12V 22Ah). YUASA CODE: REC22-12. For standby power this range has a nominal 5 - 8 year life.
eBay