I just got new batteries this afternoon and just got done putting them in. They are Napa Legend 75 batteries. The guy told me they were made by deka. My question is they seem fairly small compared to my old Interstates. There is about 3/4" of an inch of space on each side of the battery in the battery tray. My old batteries took up the whole tray. Is this something I should be worried about? There is an 18 month free replacement on them and 75 month nationwide warranty. Both batteries cost $150 which I didnt think was too bad.