Will then I guess you better go tell these guys how stupid they are http://www.betavoltaic.co.uk because they say it is easily shielded. Or the guys that won a NASA award for making a glowing powder that you can add to any paint to make it a light source, the shielding, a micropolymer. Used to be glowpaint.com and then MPKco.com but it seems they went out of business but that doesn't mean the tech wasn't valid. Now this from Cornell University is very interesting and open to licensing and was sponsored by DARPA. If this is true whoever runs with this could make the first betavoltaic cell inside of a tablet that trickle charges the battery. http://www.betavoltaic.co.uk/cornell...taic-cell.html And oh look... http://www.citylabs.net and they overcame the regulations. http://www.betavoltaic.co.uk/citylab...umbattery.html