content: We won't notice for a while... like when Lithium batteries took over from NiMH, and suddenly we just kind of stopped worrying about the memory effect and everything lasted three times as long. But this kind of "battery breakthrough" comes up every few months in the media and so far (apart from a few obvious ones like the nanophosphate LiPoly batteries that now give us crazy high charge/discharge rates) most of them just disappear. Batteries in the real world are a lot harder than batteries in the lab.