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.

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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 the vibrations of driving and batteries for notebooks that get power as you walk through the airport. The little battery is about the size of the tip of a pencil.