NOVELTY - A battery has an anode, a cathode and an electrolyte having electrical conductivity of greater than 10-3 S/cm at ambient temperature. The electrolyte comprises a compound (A) that chemically interferes with flame propagation.    USE - For electric vehicles, automobiles, motorcycles, motor homes, trucks, boats, apparatus that is motor driven, and portable electronic components such as computers and cellular telephones.    ADVANTAGE - The flame retardant electrolyte (1) is safe; (2) shows no diminution in conductivities due to presence of thermal runaway inhibitor; (3) significantly reduces the exothermic reactions at high temperature; (4) shows excellent charging and discharging capacities; and (5) shows excellent capacity retention after 17 cycles with no detrimental effect on cell during cycling. The reduction and shift in the self heating rate of the thermal runaway inhibitor significantly inhibits the non-flammability of current electrolyte systems without affecting existing battery technology.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a compound (A);    (2) a flame retardant electrolyte which has thermal runaway inhibitor which chemically interferes with flame propagation, contained in an organic solvent;    (3) production of thermal runaway inhibitor, comprising:    (i) mixing a starting material selected from 2,6-di-tert-butyl-4-methylphenol, phenol, triethanolamine, N-hydroxysuccinamide, 2-imdazolidone, 3-hydroxypyridine, diphenylamine and succinimide with organic solvent to form a solution;    (ii) mixing the solution with a base to form a reaction mixture whose temperature is adjusted to produce a chemical reaction;    (iii) adding another starting material selected from dialkylhalophosphate, dialkyl(chloromethyl)phosphonate, dialkylhalothiophosphate and diarylhalophosphate,    (iv) adjusting the temperature and    (v) removing the organic solvent to produce the inhibitor; and    (4) a battery system which has batteries comprising compound (A) and are operatively connected.    DESCRIPTION OF DRAWING(S) - The figures show electrochemical stability of electrolytes without and with thermal runaway inhibitor.