NOVELTY - A battery (200) consists of a cathode (202) primarily comprising hexacyanometallate particles (204) overlying a current collector (206, 218), a nonaqueous electrolyte (212), and an anode (214). The hexacyanometallate particles (204) have composition containing metals chosen from groups 1A, 2A and 3A and metals having valence of 2+ and 3+.    USE - Battery e.g. lithium-ion battery, sodium-ion battery and potassium-ion battery used in electrochemical devices.    ADVANTAGE - The battery with hexacyanometallate cathode has no zeolitic water content and can withstand higher voltages.    DETAILED DESCRIPTION - A battery consists of a cathode primarily comprising hexacyanometallate particles overlying a current collector, a nonaqueous electrolyte, and an anode. The hexacyanometallate particles have composition of formula: AxM1mM2n(CN)z.d(H2O)zEO.e(H2O)bnd, where A is a metal chosen from groups 1A, 2A and 3A of periodic table, preferably sodium, potassium, magnesium, aluminum, zinc, or calcium, M1 and M2 are metals with 2+ and 3+ valance, preferably titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, calcium, or magnesium, (H2O)zEO is zeolitic water molecules, (H2O)bnd is bound water molecules, x is 0.5-2, m is 0.5-1.5, n is 0.5-1.5, z is 5-6, d is 0, and e is 0-8. INDEPENDENT CLAIMS are included for the following:    (1) hexacyanometallate cathode (202); and    (2) fabrication of hexacyanometallate cathode (202) with no zeolitic water content, which involves exposing the hexacyanometallate particles (204) to dehydration annealing at 120-200 degrees C, and forming the particles in which d is 0 and e is less than or equal to 1.    DESCRIPTION OF DRAWING(S) - The drawing shows a partial cross-sectional view of the battery with a hexacyanometallate cathode.    Battery (200)    Cathode (202)    Hexacyanometallate particles (204)    Current collector (206,218)    Conductive additives (208)    Binder (210)    Nonaqueous electrolyte (212)    Anode (214)    Electrochemically active material (216)    Separator (220)