In a sealed battery pack comprising a plurality of serially disposed cells in which power generating elements are housed in prismatic cell cases and the openings thereof are sealed, the plurality of serially disposed cells are housed in a cooling box, and the top openings in the cooling box and the openings in the various cell cases of the cells are sealed by integrating lids. The flashing member includes a lower flashing portion and an upper flashing portion. A small board is installed on the computer motherboard that has an SCbusCTbusMVIP bus connector, an SCbusCTbusMVIP bus switching ASIC, a control processor, memory, and associated logic, and at least one of an IDE, SCSI, DIMM, or SIMM interface.