Sony Vaio PCG-V505EX Laptop (1.50-GHz Pentium M (Centrino), 512 MB RAM, 60 GB, CDRW & DVD Combo Drive) Stylish and utterly professional, the Sony Vaio PCG-V505EX is a lightweight notebook It comes with a 512 MB built-in memory a good start for power users--with a maximum memory expansion up to 2.05 GB The included rechargeable lithium-ion battery (PCGA-BP2V) offers between 2.5 and 6.5 hours of life with typical usage Also contains rechargeable lithium-ion battery, AC adapter, and operating instructions The V505EX Notebook offers a massive hard drive and plenty of RAM, as well as Microsoft Windows XP Home Edition