Originally Posted by GKjeep
Seriously? I just researched this forum a month ago and couldn't find a bad review. I just got a yellow top like. 2 weeks ago :/ do they just tend to die out in a few years or what?!
There are probably at least a hundred or more negative Optima reviews. Optima used to make a superb battery, then JCI (Johnson Controls Inc.) bought them out and moved all of their manufacturing to Mexico. It's my strongest possible personal opinion that their quality and reliability has been mixed at best, poor in general.
I went through three Optima batteries that all failed prematurely, two Yellow Tops and one Blue Top. Never again will I buy another Optima battery.
The battery that has taken off like a wildfire in terms of acceptance, popularity among Jeep owners, and quality/reliability is the Diehard Platinum which is an AG battery made for Sears by Odyssey. It's a superb battery, I installed my first Diehard Platinum 4+ years ago, am running another in my current TJ, and I'm so much more happy with it than I ever was with my Optimas. Heck I was always having to recharge the Optimas, I've yet to have to recharge my Diehard Platinum.
Finally, the same Group 34 size Diehard Platinum weighs nearly 10 lbs. more than the same Group 34 size Optima Yellow Top or Blue Top does. The reason being that the Diehard Platinum has significantly more battery in the same exterior dimensioned case. The below illustration shows why...
Diehard Platinum/Odyssey on the left, Optima on the right.