I thought USB batteries were cutting edge, but these solar batteries certainly dominate in this power battle. The innovative green-charging option lets you juice up your batteries simply by exposing them to sunlight -- that's it; no electrical sockets, ever.
Knut Karlsen dubbed his solar gems, which are covered in flexible photovoltaic panels, SunCat C-cells.
It seems like just yesterday rechargeable batteries were all the rage; everyone had those big bulky boxes plugged into the wall, sucking out un-eco electricity to rejuice the household's supply of AAs.
These solar batteries will once again revolutionize the way we power up our electronics.