TECHNOLOGY FOCUS - ELECTRONICS - Preferred Battery: In the battery, the redox shuttle comprises an aromatic compound having at least one aromatic ring with four or more electronegative substituents, two or more oxygen atoms bonded to the at least one aromatic ring, and no hydrogen atoms bonded to the at least one aromatic ring. The battery further comprises a number of bar connectors securely attached to each one positive electrode and to each one negative electrode in the each one electrochemical assembly; at least one bar connector being securely attached to the each one positive electrode and at least another one bar connector being securely attached to the each one negative electrode. Each electrochemical assembly comprises a substantially spirally wound electrochemical assembly. The substantially spirally wound electrochemical assembly has an inner surface and an outer surface, the inner surface defining a central space; and where the central space is substantially filled with a compliant material, the compliant material having elastic behavior. Moreover, an outer surface of the substantially spirally wound electrochemical assembly is inclined with respect to a center axis of the substantially spirally wound electrochemical assembly; inclination constituting a taper, the taper being selected to be substantially equal to a taper of walls of each cell cavity from the number of cell cavities. At least some of the of the number of electrochemical assemblies are connected in series; and where the battery comprises at least one bimetallic joint connector connecting the positive electrode in one electrochemical assembly to the negative electrode in another one of the number of electrochemical assemblies in order to connect the one electrochemical assembly in series with the another one of the number of electrochemical assemblies; where one section of the at least one bimetallic joint connector comprises a metal compatible with the positive electrode and another section of the bimetallic joint connector comprises another metal compatible with the negative electrode; the one section being electrically operatively connected to the another section. The externally exposed surfaces of the at least one bimetallic joint connector are substantially covered with an electrolyte resistant material. The container comprises a layer of conductive material substantially providing a barrier to moisture and vapors, where the layer of conductive material is embedded within walls of the container, disposed on external surfaces of the container, or disposed on internal surfaces of the container. The battery also comprises a desiccant component disposed inside each cell cavity. The cover comprises a conductive material layer disposed on an internal surface, of the cover; the conducting material layer substantially providing a moisture barrier. Each electrochemical assembly comprises a substantially spirally wound electrochemical assembly; where the each substantially spirally wound electrochemical assembly has a hollow center; and where the hollow center is substantially filled with a compliant material, the compliant material having elastic behavior; where at least some electrochemical assemblies from the number of electrochemical assemblies are connected in series; and where the battery comprises at least one bimetallic joint connector connecting the positive electrode in one electrochemical assembly to the negative electrode in another electrochemical assembly in order to connect the one electrochemical assembly in series with the another electrochemical assembly; where one section of the at least one bimetallic joint connector comprises a metal compatible with the positive electrode and another section of the bimetallic joint connector comprises another metal compatible with the negative electrode; the one section being electrically operatively connected to the another section; externally exposed surfaces of the at least one bimetallic joint connector being substantially covered with an electrolyte resistant material: the container comprising a layer of conducting material substantially providing a barrier to moisture and vapors; and the cover comprising a. conducting material layer disposed on an internal surface of the cover; the conducting material layer substantially providing a moisture barrier. Each electrochemical assembly is connected in series with another one of the number of electrochemical assemblies. The positive electrode in the each electrochemical assembly comprises an olivine compound having a composition LixM'yM''a(PO4), and a predetermined surface area.M'=Fe;M''=a first row transition metal selected from Ti V, Cr, Mn, Co and Ni;x= greater than or equal to 0; anda and y= greater than or equal to 0.The positive electrode in the each electrochemical assembly comprises a lithium transition metal phosphate material having a predetermined specific surface area and including only one transition metal, the lithium transition metal phosphate material, and the surface area selected to provide at least two co-existing olivine phases during cycling of the battery, where the two co-existing olivine phases include a lithium-rich transition metal phosphate phase and a lithium-poor transition metal phosphate phase, where a percentage molar volume difference between the two phases is less than 6.4%. The predetermined specific surface area is at least 20 m2/g. The positive electrode in each electrochemical assembly comprises an olivine compound having a composition LixM'yM''(PO4), and a predetermined surface area. The positive electrode in each electrochemical assembly comprises a lithium transition metal phosphate material having a predetermined specific surface area and including only one transition metal the lithium transition metal phosphate material, and the surface area selected to provide at least two co-existing olivine phases during cycling of the battery, where the two co-existing olivine phases include a lithium-rich transition metal phosphate phase and a lithium-poor transition metal phosphate phase, where a percentage molar volume difference between the two phases is less than about 6.4%. The predetermined specific surface area is at least 20 m2/g. Preferred Method: In obviating the need for battery management system to balance cells in multi-cell battery, the redox shuttle comprises an aromatic compound having at least one aromatic ring with four or more electronegative substituents, two or more oxygen atoms bonded to the aromatic ring, and no hydrogen atoms bonded to the aromatic ring.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The compliant material comprises a flexible and inert polymer. The flexible and inert polymer comprises polyisobutylene. The electrolyte resistant material comprises an electrolyte resistant polymer, where the electrolyte resistant polymer comprises polypropylene.