A lithium secondary battery comprises a negative electrode containing lithium metal or a material previously storing lithium as an active material, a positive electrode containing a positive active material, and an electrolyte containing a non-aqueous electrolyte solution. One embodiment of the invention includes a microphone capsule configured to be mounted within the pressure zone of a vibrating surface. The GeSiSi waveguide structure outputs an optical or electrical output signal associated with the selective optoelectronic operations performed on the input optical signal. The average bandwidth utilization for each client device is aggregated and selected clients are forced to roam to other access points if the aggregate bandwidth is equal or exceeds a threshold. , as a chemoattractant for immature dentritic cells or memory T cells.