I bought a gizmo at Brookstone today. It is a 4-way charger for the ipod. 1. USB connection 2. 110v wall connection. 3. automobile 12 v plug. 4. It take a 9 volt battery which charges the ipod. Does anyone know if a 9v has enough mah's to be of any use. I don't know how much "oomph" the itouch battery has.