Dual Electronics has introduced its new GPS Navigation & Battery Cradle for the iPod touch. The combination battery pack and GPS add-on offers a built-in GPS receiver, a rechargeable battery, an amplified speaker, audio output, and a mini-USB port for charging. Also included in the package is an adjustable windshield mount and Dual’s NavAtlas turn-by-turn navigation app with TTS technology and up-to-date U.S. and Canadian maps from Navteq.…