Future power sources for mobile communications

As the encroachment of portable electronics into everyday life continues, the demand for improved power sources is continuing to increase. New technologies such as nickel metal hydride and lithium ion batteries have largely replaced nickel cadmium systems because of their superior performance. The paper reviews the developments in battery technology and looks ahead to the future of portable power sources. In doing so it aims to advise the reader on the possible future technologies that they may one day be using.