Well u will want what ever fits ur car ..i doubt a 31 would fit ..do u have a orielleys parts near u? They have superstart agm batts that are also the same company as deka and duracell ..all made by east penn
Im running and have been running the Orileys Super Start AGM batts,and have an excellent warranty.No issues thus far with the big 6 under the hood of truck with 255 amp alt,two batts..CVR stock alt one SStart AGM Gr.34 under hood with modification plate and removal of air box and place C?Air intake off of Throttle body,2nd SStart AGM at rear in tire well,grounded to rear-end frame bolt, both to Distro blocks.No issues(after doing ELD Bypass in Honda, could use a bit larger alt. maybe a 140 min?) Excellent warranties on them(like 3 yrs. and up to 5 pro rated if im not mistaken?) and crank everytime.Great batts