A battery having a complete discharge mechanism includes a spring-biased switch with an element spring-biased from the switch and acts to close the switch when in a fully extended position. From among packets received from Ethernet 820a, a packet, a destination of which is a communication device 800, is held in the buffer 100a. A third image processing portion again divides each line of image data into n blocks of image data, and performs third predetermined image processing on the image data using the respective synchronization signals, the period of each of which is the original period. The second end of the first mat is between the second and fourth tube sheets and the second end of the second mat is between the first and third tube sheets. A generatormotor rotor and a generatormotor are also disclosed.