Sony prototyped a fuel-cell system small enough to fit in one hand (50×30mm). It works by combining a fuel cell, a Li-polymer secondary battery, a control circuit and so forth together to output up to 3W of power. Its use efficiency of energy is high enough that 14 hours of 1seg movie can be continuously played by general mobile phones.
The new fuel-cell system is direct methanol type and uses methanol as fuel. Also, it is an active fuel-cell system, which controls fuel supply with a pump. The system is hybrid type with the output supplemented by a Li-polymer…
