I bought a red top and have had no problems!! Can run the radio with the car off. Car can sit for weeks with no problems starting. Worth every penny
I got the yellow top but it was worth every cent fwiw. Swapped to a yellow and feel like I could start first time every time in the tundra.
My yellow top in my mk1 is 8 years old. My yellow ro in my R is 7 months old. They're great.
I installed an Optima Yellowtop D35. The D35 is shorter than the Q85, but the terminal cover provided by Optima doubles as a base to increase the batteries height. Great design Optima! Immediately after installing the battery, the "Battery Management System Malfunction" message still displayed. Finally after leaving the car overnight, the message went away on its own. The i-ELOOP system is now functioning as normal.
I have a red top in my XJ and people say the quality has gone down every time Optima is mentioned but I've had nothing but stellar performance from mine. I was about 7 miles in on a trail 2 weeks ago and my alt died. The battery got me back to the main road before it died enough to not run the engine anymore. A little more than an hour back out and some gnarly rock crawling.
I got 7 years out of my 2010 6V Red Top in the Porsche which I replaced with another and recently purchased a 12V Red Top for the Bus. Battery is more expensive than standard but getting 7+ years vs 4 makes it worth while.
So, I replaced it with a new optima battery anyways. Still have the issue.... Moved onto the car alternator. Tested it with my DVOM and it was giving out 13.7V at idle.
I've never been impressed with an Optima battery.
Optima isn't nearly as good as it used to be. I've owned a lot of their dry cell batteries and they've gone to **** over the years. They don't hold up well to this kind of use, and if they drop below 11V they **** the bed.
Once Johnson Controls bought them, they've become worse and worse.
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