I'd like to see one of those up close. You can build your own fuel cell...thousands of plans on the web, but nothing tiny and self contained like that.
Butane is light and cheap and 14 charges is substantial.

I just threw a "solar cell phone charger" in my junk box because even in bright sun, it barely kept up with the phones demands and would require 9-18 hours to charge a dead phone, IF, it could keep the phone alive at all.

The best thing I've come up with yet is a kinetic charger that converted your body movements to power, like a shaker flashlight. Still, you had to be moving all day.

There ain't no free power.