There is provided an antistatic agent that preserves its antistatic property for a long period of time and has the appearance and the transparency that are not impaired when kneaded into a resin, and a resin composition containing the antistatic agent. The first battery module may include a first coolant flow path and the second battery module may include a second coolant flow path. The low ring of resistance to radial movement may be by selectively profiling the tubular housing formation or rendering it circumferentially discontinuous. Because the layer jump operation is performed at the inner circumference of the optical disc, where the optical pickup will not likely encounter a data area which includes location information, a target position seek operation which requires a jump between multiple layers of the disc can be precisely and rapidly performed. The spacer block may also be formed from virgin andor recycled plastic material andor include virgin or recycled rubber material, such as that obtained from the regrind of used tires, andor another elastomeric materials from other sources.