A robotic device can provide power management and other functionality for various electronic devices. The electrodes are structured in such a way that the apparatus’s layers are protected during structuring and the components may be tightly packed together to improve display resolution. The plural plates are connected in the axial direction by a connecting member, and joined to a first fixing member. Completing the call by encoding voice signals using a common voice compression algorithm executed by the digital wireless telephones and by sending the encoded voice signals through a data network eliminates the drawbacks associated with the additional intermediate encoding which would have been required if the call had been completed using the circuit switched network. R is the particle radius of the conductive particles.