Cure poor mobile battery life – just by speaking

The days of your mobile phone battery dying mid-conversation could be numbered, thanks to new technology that could let you charge your mobile phone simply by speaking into it.

The multifunctionality of modern smartphones comes at a price – accessing the 3G internet on your mobile, for example, is notoriously power-hungry. Lots of industry work is underway to improve mobile battery power or offer alternative ways of charging your mobile.

In the latest development from South Korea, scientists at Sungkyunkwan University have developed a technigue which would allow your mobile to be charged up by the power of your voice while you hold a phone conversation, or even by background noise.

Speaking to the Telegraph, developer Dr Sang-Woo Kim said: ‘The sound that always exists in our everyday life and environments has been overlooked as a source [of energy]. This motivated us to realise power generation by turning sound energy from speech, music or noise into electrical power.

‘Sound power can be used for various novel applications including cellular phones that can be charged during conversations.’

The sound-conversion technology involves a sound-absorbing pad, which vibrates when spoken into and generates an electrical current using Zinc oxide wires that can then be used to charge a battery.

The current system is not sufficient to charge a mobile phone properly, but technology improvements could generate more power.

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