When you buy the cheapest model of ANYTHING you don't get their best product. Warrantied for a year and that's how long they lasted. Not a coincidence. Good luck / Skip
Interstate 6 volt batteries are warranted for 6 months not a year. Look at the sites posted above and learn how to take care of 6 volt batteries, they have to be equalized and cycled or they will not last.
I don't have any suggestions that would be different from those already posted. All I can tell you is that my coach and chassis batteries are Interstate and going into the 5th year with no problems and some of our camping is boondocking. They are the originals that came with the m/home.
Jenny & Bill
2004 H/Rambler Ambassador 34PDD
Cummins ISC330 Allison 6 speed
2003 Chevy Malibu Toad
8 year old Yorkie (Cocoa).
Whtbass wrote: I can not believe the people who are so quick to defend a company like Interstate! They are not known for high quality and I would try to be more helpful instead of being so quick to assume the poster erred.
I read the original post, the way he wish to approached his problem is like asking for a slapping.