Did a winch pull this weekend with a lead acid battery rated at 650 CCA and 110 reserve minutes. It worked just fine. It was a typical short pull just to get unstuck. I turned the Jeep off right after the pull and it started right up afterwards. I have no idea how winching will affect the life of this battery but at a local cost of 1/3 what an Optima costs, it will be interesting to see how it works out for me (no other high amp accessories have been added to my YJ, no extra lights, no electric fan, it doesn't even have a radio). One drawback will be keeping corrosion off the connections, the optima required no cleaning for 4 years.