. "For example, suitable solid state electrolytes include, for example, lithium phosphorous oxynitride (LIPON), Li0.33La0.56TiO3 (see Brouse et al., J. Power Sources 68:412 (1997), incorporated herein by reference) and Li2xSr1???2xM0.5???xTi0.5+xO3 where M is a metal, such as Cr, Fe, Co, Al, In or Y, with a preferred form being Li0.5Sr0.5(Fe or Cr)0.25Ti0.75O3 (see Watanabe, J. Power Sources 68: 421" . . .