[EricH]

Originally Posted by Doc Wu

I'm surprised they missed several other manufacturers that make equivalent batteries.

I don't think they did miss them. From the R31 blue box: "To seek approval for an equivalent battery, please contact frcparts[at]usfirst.org with the battery supplier and part number. Approved batteries will be added to the list above." (Slight change so the contact doesn't get spammed to death.)