Matsushita Battery Industrial, a division of Panasonic, has a developed a working model for a direct methanol fuel cell (DMFC) powered laptop. The DMFC system generates electricity from a reaction between a mixture of methanol and water and air. In conjunction with a standard laptop battery, the computer can run for about 20 hours. Before it can be sold commercially, the DMFC technology has to overcome several hurdles, including the high cost of the system. Currently, several of the components involved would make the DMFC system cost more than the laptop it powers.