Found an article on A123's next gen cell, a 20Ah prismatic. They also said some 4, 6, and 8Ah cells are due to be produced as well? That would be nice for us RCers. It says cost will be drasticall reduced, power density has doubled
and energy density has gone up as well, 50%, on par or higher than LiPo apparently. The 26650 is 100Wh/kg, so
150Wh/kg vs. 140 Wh/kg for Lipo?
The prismatic cell features an increased energy density through new anode and cell designs. New materials provide increased cycle life and energy density. On the cathode side, A123Systems has scaled up its efforts to reduce costs through improved and more efficient processes, and continues to expand cathode development to improve both capacity and energy.
At the cell level, the energy density (Wh/kg) of the new 20Ah cell is 50% greater than that of the old 26650 cylindrical cell (from 2007), while the module level energy density increased by 30%.