Hey Doughty,
The other night I was reading a thread about a Korean produced device which allows a person to breath underwater without a scuba tank.
This in itself was interesting as it filters O2 out of the water using battery current. What was real interesting was the claim that they had created a new battery technology that has a much longer lasting charge, and recharges in the fraction of the time.
I'll try to find it.
Thanks for the mention. I look forward to seeing what you find.