NOVELTY - Battery (300) comprises: an enclosure; a current collector (310) within the enclosure; an anode (320) that will operate at ambient temperature or lower within the enclosure; a cathode (318) that will operate at ambient temperature or lower within the enclosure; and a separator and an electrolyte (316) within the enclosure between anode and cathode.    USE - The battery is useful: in automotive batteries, hybrid electric vehicle, plug-in hybrid electric vehicle, buses, delivery vans, transport trucks, locomotives, uninterruptible power supplies for server farms, load leveling and grid storage, and marine and aerospace applications; for energy storage in battle field applications comprising military bases, silent watch, propulsion for ships, directed energy weapons and other applications; and for energy storage in electric vehicles, electrical grid storage and deep-sea rescue vehicles.    ADVANTAGE - The battery: operates at ambient temperature or lower, thus eliminates the need for thermal insulation, avoids the energy losses associated with heat leakage, and reduces auxiliary heating and insulation against the weather; provides high-performance rechargeable sodium-beta battery, with twice the specific energy of the best lithium-ion system; has a specific energy greater than 400 Wh/kg, twice that of the best lithium-ion batteries, as it utilizes beta ''-alumina sodium conducting separator; does not produce gaseous products in the event of overcharge, which is a disadvantage of the current generation of high-temperature sodium- alpha cells; and is intrinsically safe, and exhibits long cycle life due to exceptional reversibility and dimensional stability over thousands of charge-discharge cycles, thus achieves unparalleled system life and life cycle cost.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) an ambient temperature battery comprising: an enclosure; a current collector within the enclosure; a liquid sodium anode within the enclosure, where the liquid anode is made of eutectic sodium material that is liquid at less than or equal to 15 degrees C; a cathode that will operate at ambient temperature or lower within the enclosure; and a separator and electrolyte within the enclosure between liquid sodium anode and cathode; and    (2) making the battery comprising: providing the enclosure; providing the current collector within the enclosure; locating the anode that will operate at ambient temperature or lower within the enclosure; locating the cathode that will operate at ambient temperature or lower within the enclosure; and positioning the separator and electrolyte within the enclosure between the anode and cathode; and    (3) a battery comprising: an enclosure; a current collector within the enclosure; an anode chamber; a liquid sodium-potassium anode material that will operate at ambient temperature or lower within the anode chamber; a cathode chamber; a liquid sulfur-bromine or other cathode material that will operate at ambient temperature or lower within the cathode chamber; a separator and an electrolyte within the enclosure between anode chamber and cathode chamber; an anode material storage tank containing the liquid sodium-potassium anode material; an anode material circulation system for circulating the liquid sodium-potassium anode material from the anode material storage tank to the anode chamber; a cathode material storage tank containing the liquid sulfur-bromine or other cathode material; and a cathode material circulation system for circulating the liquid sulfur-bromine or other cathode material from the cathode material storage tank to the cathode chamber.    DESCRIPTION OF DRAWING(S) - The figure shows a view of the battery.    Battery (300)    Current collector (310)    Separator/Electrolyte (316)    Cathode (318)    Anode (320)