Featuring the fast Mobile AMD Sempron^™ 32-bit or 64-bit AMD Athlon and Turion processors and smart PowerNow! technology, the full featured ECS 536 delivers the ultimate mobile computing experience with up to 65 percent longer battery life and on demand performance. Better yet, working with Windows XP Service Pack 2, its Enhanced Virus Protection delivers a new level of processor-based protection against the most virulent viruses.