This looks interesting:
http://www.sedansa.be/info/Omni_Presentation_EN.pdf
It's basically a knock-off of the KISSbox, but the usb cable looks like it might plug directly into the battery, and it includes a power pack using 3 AA batteries which plugs in the same way.
http://www.sedansa.be/info/Omni_Presentation_EN.pdf
It's basically a knock-off of the KISSbox, but the usb cable looks like it might plug directly into the battery, and it includes a power pack using 3 AA batteries which plugs in the same way.