I finally killed my Optima yellow-top after over 6 years of use and three different vehicles. It still works, just won't hold a charge for more than a week or so.

When I got my Dragon home from the dealer I pulled the OEM battery out and put in the Optima, which just got replaced with a new red-top Optima. My battery terminals look like the day I picked my VX from the dealership, brand new with absolutely now corrosion.

That's the beauty of the Optima batteries: They don't gas, corrode, can be mounted in any position (including inside a vehicle) and are extremely resistant to vibration and heat. I've got two of the new industrial Optimas coming for my Ford diesel farm tractors and just put a red-top in the diesel Mercedes I'm playing with.

There just isn't another battery remotely comparable, plain and simple.