Gripping pliers consisting of a jointed clamp and handle. Thereafter, a spacer is formed at the topology. An emitter and a collector are formed in contact with and on opposite sides of the base-region barrier to form a bipolar junction transistor. In the second retention state, the retention component is powered at a lower supply voltage than in the run state, and the non-retention component is powered down. The accumulator power supply unit comprises plural accumulator blocks in a series connection or a serial-parallel connection and plural transform charging circuits connected in parallel to the respective accumulator block, wherein the respective accumulator block is independently charged by the transform charging circuit and a control method for the same.