Optima battery is the most advanced engine starting battery available today. The patented SPIRALCELL Technology provides many features and benefits not found in conventional automotive batteries. The Optima's SPIRALCELL Technology provides more power for faster, crisper starts. OPTIMA Yellow Top batteries, featuring SPIRALCELL Technology, are designed for all of your deep cycle needs. It's perfect for people who are serious about sound. OPTIMA's power is cleaner with higher voltage output than conventional batteries. You can play your system louder and longer. And they have a greater cycle life so they can be drained and recharged more often. Plus, they're spill-proof and can withstand 15 times the vibration of ordinary batteries. Does your vehicle have a lot of accessories like running lights, high-performance stereo/AV system, winches, or hydraulics? Your vehicle demands more from its battery. OPTIMA Yellow Top batteries provide the extra performance and deep cycling capability that your vehicle demands.