I have to agree with John. I have a Jeep and I used to go off-roading ALLOT. I was replacing batteries every two years at most. Since I stopped (no time anymore), with the same Jeep I've been able to keep batteries up to 4 years at most. Yes same type and brand of battery was used, Interstate. Even if you strap it, bolt it, wedge it or glue it in, it will still take allot of abuse. Again, if you get a Gel Cell Like the Optima Battery or the Exide one like Dick informed us on, they are made to handle the abuse and last allot longer. But then again, who goes off-roading with their D? That's IMHO. Steve