Battery life has become an important factor to consider for some in purchasing a phone. We mostly want cellphones with batteries that can make us proud.
Imagine your flat battery coming alive simply by speaking into it. WOW right? Perhaps also nonsense? Maybe not for too long.
Dr Sang-Woo Kim of the Sungkyunkwan University is making advances in energy-harvesting techniques for turning sound into small amount of energy that could be used to power highly efficient mobile devices.
This scientist from South Korea is using nanoscale zinc-oxide strands sandwiched between electrodes to turn the vibrations of speech into electricity.
The saying ‘life and death are in the power of the mouth’ might just be true for our cellphones as this technology among other things hopes to harness cellphone users voice to charge their device battery while they are talking.
A prototype device used produced 50 milivolts of electricity from about 100 decibels of sound. One milivolt being a thousand of a volt. Although this energy generated isn’t enough to charge a battery today, this scientist is optimistic enough about the approach.
Meanwhile, Nokia jas patented a mechanism to harvest kinetic energy such as the bouncing of a phone in a pocket when one is walking, for charging batteries.
So do we see better times ahead for battery life?