Nanotube technology could make mobile device AAA Ni-MH batteries last longer

　　Can the AAA Ni-MH batteries of mobile devices become thinner and lighter and have a longer service life? This has always been the focus of technology enthusiasts. Now, their wish may soon come true.

　　Recently, engineers from the University of Illinois in the United States invented a nanotube technology that is expected to significantly extend the battery life of mobile devices and make the battery thinner and lighter.

　　It is reported that researchers at the University of Illinois have developed an ultra-low-power digital memory. It runs faster, but consumes only about 1/100 of the energy of similar memory. By using this kind of memory, it can significantly reduce the power consumption of the flash memory used by smartphones and other mobile devices to store music, videos and other content.

　　Ericpop, an assistant professor of electrical and computer engineering at the University of Illinois who led the research team, said that using this new technology, combined with some power-saving projects being developed in other components, such as display power saving, is expected to make mobile devices commonly used by people today. The power usage time is extended by 10 times. "I think those who have to charge a large number of their mobile devices every night will definitely hope that the battery of their mobile phone or laptop can last for weeks or even months." Pop said.

　　It is understood that pop and his research team have produced low-power memory. Nanotubes and microscopic carbon tubes, which are 10,000 times thinner than hair, are mainly used to replace traditional titanium or tungsten wiring. The researchers also paired the nanotubes with a "phase-change substance" that changes shape when charge is conducted.

　　Meanwhile, the same substance is used in DVDs, which store videos and music. The chemical compound, called a chalcogenide, changes back and forth between amorphous and crystalline when the charge carried by the nanotube is conducted. These different states are used to represent bit or two-bit numbers and are used to store data in flash memory used in handheld devices.

　　The researchers say the invention uses far less power than flash memory, which stores bits as electrical charges and therefore requires more power. Using phase-change materials requires only a tiny charge to change the material, which remains in its traditional state until it is conducted again. Pop also said that because no continuous charge is required, there is no risk of data being erased if the storage device is placed close to a magnet.

　　In addition, the researchers also pointed out that this technology can be applied to any device that uses AAA Ni-MH batteries, such as satellites, communication equipment installed in remote areas, and even many scientific research and special equipment.

　　However, Pop also admitted that if this technology is really used in smartphones, the power usage time will be affected by many other factors. Simply improving the power saving of some components may not necessarily solve all problems. For example, as the functions of mobile devices increase, power consumption may also increase.

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