Battery AH Question

[MCompact]

I just installed an AutoZone H5-DLG battery in my Clubman. I'm trying to find the AH capacity for the IBS, but of course no one at AutoZone support-email or phone-has any idea of what I'm talking about. I believe its 55 AH or 60 AH so I set it at 55 AH for now- but Id like to get the actual spec. Any help would be appreciated!
--

 

[GSCJR]

42 Ah, if that's an option, otherwise it's 55 Ah, if you cannot enter specifics.

 

[Carmudgeon]

That Clarios battery, wearing a Champion H5-650CHP label , appears to be rated at 54Ah.