Battery problems, oh my! Interstat

For years I had to replace the battery in my Chevy every 2-3 years. I had tried seemingly every brand on the market, including an Interstate back in the early 90s. I tried another one in '05 and it proved to be the first battery that car has seen to last 60 months. I killed it several times but it always bounced back. I replaced it with another Interstate. Both were bought from local independent mechanics who I trusted. Heck, I wouldn't go in to a chain store like Firestone to get my air topped off.