Cool, but how many watts per square meter? It sounds like a salt-water battery which has very limited puissance. Doubtful if you can get over 10 watts per square meter, which makes it economically dubious. Also there is no way to put the cells in series without expensive barriers and extensive plumbing. Very, very dubious.

Hmm, is it just a coincidink that several web sites have been giving me blank pages over the last three days? On my iPad?

What about some things for longer life, like keyboards and batteries that last more than a few hours?