Beaming power from space

As the title says, the SSPIDR researchers propose beaming power from space (h/t Green @Insty).

It's not new tech, but that not-new tech required gallium: expensive, and set to be more so. The Spider Men say they can make do with alumin(i)um now. Aluminium is expensive only in energy-cost. Exactly which costs, this tech is set to lower. Of course it requires satellites too, also expensive to get up there... but a lot less so these days.

They're tight-beaming this to specific locations, even to military forward-operating-bases. This suggests low-Earth-orbit satellites, beaming to the charging station every two hours over the maybe 15 minutes it's in line-of-sight. (It's hyphens or 3LAs, style cops; choose one.)