Electricity generator in your backpack
Here is an interesting big gadget. As any professional examiner of mobile telephones will know being called to deal with onsite examination where no electricity is available can be a nightmare. Lugging back power supplies can be a pain, particularly if having to move between locations. This device may bring some relief although it may not look attractive.
Developed following hurricane Katrina (2005), the backpack has been designed to "assist first responders and disaster relief workers to generate their own electricity for communications devices, night vision goggles, water purifiers or other crucial, portable electronics", according to http://msnbc.msn.com/id/9245155/.
I can see it having application under certain conditions, however, expect some frowns if any mobile 'phone examiners turn up at court wearing one..