400 Whr/kg is competing for the highest energy density applications that can run on rechargeable batteries. Things that fly. Cars. Not grid storage. I mean if

400 Whr/kg is competing for the highest energy density applications that can run on rechargeable batteries. Things that fly. Cars. Not grid storage. I mean if it was otherwise suitable for grid storage it's not a downside obviously, but at those energy densities it can be inferior in terms of cost and/or cycle life and still be commercially viable in other significant markets. Not to mention this is research, it doesn't have to directly result in a commercially viable product.