I guess I missed this:
http://www.amazon.com/Projected-Capacitive-Touchscreen-Compatible-thickness/dp/B00DS18ZTG/ref=pd_sim_pc_6/176-7136640-8541063?ie=UTF8&refRID=0HMMESBQ04HGZGZ25KTJ
With a portable power pack it should work fine (though a few of the reviews are indicating that the USB connector's dodgy).
http://www.amazon.com/Projected-Capacitive-Touchscreen-Compatible-thickness/dp/B00DS18ZTG/ref=pd_sim_pc_6/176-7136640-8541063?ie=UTF8&refRID=0HMMESBQ04HGZGZ25KTJ
With a portable power pack it should work fine (though a few of the reviews are indicating that the USB connector's dodgy).