APFW beating lithium batteries !!! MUST READ:
" but the Navy is so excited about the notion of using other than battery technology for powering UUVs – unmanned, undersea vehicles – that they've come out with two very large new programs this calendar year, to bring into the operational Navy new power sources beyond batteries. They've given up on batteries as being too short-legged: not enough mission duration, not enough time on station. We've got a technology, for example, that will provide five to ten times the energy density of a lithium battery – I used to run a lithium battery company, so I'm well familiar with that – we have five to ten times the energy density, which means five to ten times the run time of a lithium battery. "