I want my notebook and smartphone to perform well with lots of
speed for games and other uses, but I also want the battery to
last a really long time. Some of the biggest advances in
technology over the next few years will be in the battery market
as makers seek to improve the battery to make it last longer and
charge quicker. Researchers from Japan have shown off a new
battery device that is much more powerful than other batteries
of the type. The little battery is actually a power generator
that is able to make power by harnessing vibrations. The battery
is made from an alloy of iron and gallium called galfenol that
changes shape when exposed to a magnetic field. The little
battery is able to generate 20x more power from vibrations that
similar devices of its size. It has an energy density of
22mW/cm3. This type of power source has a myriad of potential
uses. They could be used for cell phones that charge themselves
as you walk. The tech could also lead to batteries for hybrid
cars that generate power from