That is pretty cool.
Just some notes:
The "nuclear batteries" used in deep space probes are RTEGs, radioactive thermoelectric generators, basically a common solid state peltier used in reverse. It is not very efficient and doesn't generate a lot of power for its space and weight.
The Soviet Union made a bunch of RTEGs which they put ON LAND, in remote areas, using cesium. I think it was all for navigation beacons. Scary fact, an unknown number of these deadly devices have since been "lost" or stolen.
"Glowrings" (aka "trasers") are a really cool tritium light source. Not a really bright glow but hey a half-life of 11 yrs. They are make in the UK but last I heard NRC banned imports of the keychain lights into the USA. I believe the gun sights and watch faces were still legal. And I think you can still find the keychains on eBay no problem. And they've allowed EXIT signs to be made with relatively huge tritium tubes.
Tritium puts out very low energy particles, and is generally regarded as safe in these applications even though it can be readily inhaled and absorbed.
As mentioned, it must be made in reactors. I know back in the 90's the US had no source of tritium period, and since it's the fusion stage of a thermonuclear bomb and decays on its own, the govt was concerned. I don't know if they ever fixed this, but the UK seems to have a consistent supply.
That battery won't put out much power. Realize that there is no way to "throttle" this reaction, it generates the same power whether it gets used or just burned up as heat. So consider an ipod that takes a few watts of power, the device will be making that much heat times the inefficiency. So if your iPod takes 1 watt, if it's similar to solar cell efficiency you'd be looking at 10 watts of radioactive decay. Well, it'll always be warmed up. I can tell you my little light tube filled with tritium doesn't give off any perceptable heat so the volume of tritium needed to do 10 watts would be pretty huge.
It's sure to have some important uses- that would be a kick-ass pacemaker battery, for example, if it can just maintain a long-life rechargeable power cell.