... is playing the role of a catalyst rather than consumed in the process (at least from the write up), so if its 10:1 per tankful, then over 100 tankfuls its 1,000:1, and over 1,000 tankfuls 10,000:1.

And if the impurities in Gallium that mess up the formation of micron scale electronics are not a problem for the process, then 99% pure Gallium would be a lot cheaper $3/gram.

On the other hand, its really a fueled-battery, and the real comparison would be with charged-batteries and other fueled-batteries ... its cheating a bit to compare it with hydrogen, which under present technology really sucks as a power storage approach.

I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.