The invention discloses a self-excitation underswing voltage stabilizing battery which is serially connection and used for the storage battery or the monomers of the storage battery unit. The battery inside is embedded or externally provided with a control module which can generate underswing by self-excitation, so as to achieve the aim of eliminating the concentration polarization and ohmic polarization produced at the charging telophase of the battery, improving the charging receiving ability and automatically balancing the end voltage of the monomers in the battery and thus realize balanceand consistence. The invention is generally used for the storage battery field needing a plurality of serially connected monomers and requiring consistence such as the valve controlled lead-acid accumulator, the nickel hydrogen battery, the lithium ion cell, the double-energy power battery, the fork battery and the small valve controlled lead-acid accumulator of the lead-acid accumulator and the UPS of the electric vehicles such as the assistant bicycle, the electric motorcycle and the electric car.