I mean... the 550 is not a valid amperage for that series of batteries.
I was wondering who told you that number, as I looked at the spec sheets and none are that strong (at the 20a/h rate)
A lot of times people will see a 6v 232 amp battery and thing... WOW If i get two I will have a 12v 464 amp battery!!!
Nope, You can add voltage or amperage, but not both.
(12v 232 amps -OR- 6v 464 amps)