(US4537843-A)      Sec. battery comprises a polymeric cpd. having conjugated double bonds in the main chain as material of a negative electrode and opt. of a positive electrode. An ammonium salt of formula NR1R2R3R4(+).X(-) (where R1-4 are 1-16C alkyl or 6-15C aryl, provided all are not the same, and X is an anion) is used as electrolyte.    The polymeric cpd. may be an acetylene high polymer poly-p-phenylene, poly(2,5-thienylene) or polypyrrole.    ADVANTAGE -   The battery has high energy density, high charging-discharging efficiency, long cycle life, low self-discharge rate and good voltage levelness at time of discharge. (11pp)    (JP93027232-B)      Sec. battery comprises a polymeric cpd. having conjugated double bonds in the main chain as the negative electrode or as the positive and negative electrodes. The electrolyte used is an ammonium salt of formula (R1R2NR3R4)(+)X(-) (I) where R1, R2, R3 and R4 are 1-16C alkyl gps. or 6-15C aryl gps.; with the proviso that the case where all of R1, R2, R3 and R4 are the same gps. is excluded, and X is an anion.    The ammonium salt may be used in the form of a mixt. with an electrolyte.    ADVANTAGE -   The sec. battery has a high energy density, a high charging-discharging efficiency, a long cycle life, a low reduced self-discharge rate, and a good voltage levelness at the time of discharging. It is also cheap, and the wt. and size can easily be diminished. (J60180072-A    (JP93082032-B)      Sec. battery comprises a polymeric cpd. having conjugated double bonds in the main chain as the negative elctrode or as the positive and negative electrodes. The electrolyte used is an ammonium salt of formula (I) where R1, R2, R3 and R4 are 1-16C alkyl gps. or 6-15C aryl gps.; with the proviso that the case where all of R1, R2, R3 and R4 are the same gps. is excluded, and X is an anion.    The ammonium salt may be used in the form of a mixt. with an electrolyte.    ADVANTAGE -   The sec. battery has a high energy density, a high charging-discharging efficiency, a long cycle life, a low reduced self-discharge rate, and a good voltage levelness at the time of discharging. It is also cheap, and the wt. and size can easily be diminished. (J60093773-A)