Sony's AC-UP100 Built-In Battery USB Charger uses a universal USB interface to provide power to a variety of electronic devices, including Bloggie camcorders, digital cameras, and MP3 players. The built-in 2000mAh lithium-ion battery gives you power in a pinch, or you can use the AC-UP100 to charge your USB device from a wall outlet. The LED status indicator lets you know when your battery is fully charged. All you need is a standard USB cable, not included.