Turbo Charge Black iTurbo power supply. Portable, lightweight reusable power supply for iPod. AlgorChip technology for extra power and safety. Advanced design regulates energy flow. Compatible with iPod 1G, 4G, 5G with video and nano 2G. Includes 1 AA battery and iPod connector. Mobility and the iPod are two magnificent partners. You can move here, there, and everywhere to listen to music, view videos (where applicable), and view photos. But power is limited. More power is but an AA battery away when you use TurboCharge IP140B. It adds hours of use to your iPod from 1 AA battery. So when you plan to be away for long periods, consider taking the IP140B with you. It's the best way to get additional power on the go!