TECHNOLOGY FOCUS - ELECTRONICS - Preferred Battery: In the lithium ion battery, the supplemental lithium corresponds to at least about 2.5-10% of the negative electrode capacity. The negative electrode comprises silicon oxide with the structure of SiOx, 0.1 less than or equal to x less than or equal to 1.5. The negative electrode further comprises elemental silicon, where the negative electrode has a specific discharge capacity of at least 700 mAh/g at a rate of C/3 based on anode's mass discharged of 4.5 V to 0.5 V. The lithium metal oxide can be approximately represented by the formula Li1+bNi alpha ; Mn beta ; Co gamma ; A delta ; O2-zFz.b=0.01-0.3;alpha =0-0.4;beta =0.2-0.65;gamma =0-0.46;delta =0-0.15;z=0-0.2 with the proviso that both alpha and gamma are not zero; andA=Mg, Sr, Ba, Cd, Zn, Al, Ga, B, Zr, Ti, Ca, Ce, Y, Nb, Cr, Fe, V, Li or combinations.The battery exhibits an average voltage of at least 3.3 V when cycled from 4.5 V to 2.0 V at a rate of C/3. The lithium ion battery has a first cycle irreversible capacity loss of not more than about 20% of the initial charge capacity for a charge to 4.6 V and a discharge to 2 V. The negative electrode further comprises carbon, where the carbon is graphitic carbon, pyrolytic carbon, carbon fibers, or a combination. The negative electrode has an average dry thickness of at least 25 microns and an active material loading of at least 80 wt.%. After 50 charge-discharge cycles between 4.5 V and 1.0 V, the battery exhibits at least 750 mAh/g discharge capacity from negative electrode active material and at least 150 mAh/g discharge capacity from positive electrode active material at a rate of C/3. Alternatively, the lithium ion battery comprises a positive electrode comprising a lithium metal oxide, a negative electrode, and a separator between the positive electrode and the negative electrode, where the negative electrode comprises silicon oxide based active material, and where the negative electrode comprises a polymer binder having an elongation of at least about 50% without tearing and a tensile strength of at least 100 MPa. The polymer binder comprises polyimide, where the polymer binder has an elongation of at least 70%. The polymer has a tensile strength of at least about 150 MPa. In a second alternative case, the lithium ion battery comprises a positive electrode comprising a lithium metal oxide, a negative electrode comprising a silicon oxide based active material, and a separator between the positive electrode and the negative electrode, where after 50 charge-discharge cycles between 4.5 V and l.0 V, the battery exhibits at least 750 mAh/g discharge capacity from negative electrode active material and at least 150 mAh/g discharge capacity from positive electrode active material at a rate of C/3. The negative electrode further comprises carbon nanofibers, graphite powder, and pyrolytic carbon. The silicon oxide based active material has a volume average particle size of not more than about 8 microns. The lithium ion battery also comprises supplemental lithium corresponding to at least about 2.5% of the negative electrode capacity. In a third alternative case, the lithium ion battery comprises a positive electrode comprising a lithium metal oxide, a negative electrode, a separator between the positive electrode and the negative electrode, and an electrolyte comprising lithium ions, where the negative electrode comprises the composite. The electrolyte further comprises a halogenated carbonate. In a fourth alternative case, the lithium ion battery comprises a positive electrode comprising a lithium metal oxide, a negative electrode, a separator between the positive electrode and the negative electrode, and an electrolyte comprising lithium ions and a halogenated carbonate, where the negative electrode comprises silicon oxide based active material and where the battery discharge capacity decrease by no more than about 15 percent at the 50th discharge cycle relative to the 7th discharge cycle when discharged at a rate of C/3 from the 7th discharge to the 50th discharge. The silicon oxide based active material comprises a silicon oxide carbon composite composition. The electrolyte comprises 5-25 vol.% fluoroethylene carbonate, fluorinated vinyl carbonate, monochloro ethylene carbonate, monobromo ethylene carbonate, 4-(2,2,3,3-tetrafluoropiopoxymethyl)-(1,3)dioxolan-2-one, 4-(2,3,3,3-tetrafluoro-2-trifluoro methyl-propyl)-(1,3)dioxolan-2-one, 4-triiluoromethyl-1,3-dioxolan-2-one, bis(2,2,3,3-tetrafluoro-propyl) carbonate, bis(2,2,3,3,3-pentafluoro-propyl) carbonate, or mixtures. In a fifth alternative case, the lithium ion battery comprises a positive electrode comprising a lithium metal oxide, a negative electrode, and a separator between the positive electrode and the negative electrode, where the negative electrode comprises silicon oxide based active material having a specific capacity of at least 1000 mAh/g when cycled between 4.5 V and 1.0 V at a rate of C/3 based on anode's mass. The silicon oxide based active material has a specific capacity at the 50th cycle of at least 800 mAh/g when cycled between 4.5 V and 1.0 V at a rate of C/3 based on anode's mass. Preferred Composite: In the composite, the anode-inert elemental metal comprises manganese (Mn), cobalt (Co), nickel (Ni), tungsten (W), zirconium (Zr), titanium (Ti), iron (Fe), molybdenum (Mo), or a combination. The composite comprises 5-45 wt.% anode-inert elemental metal; and electrically conductive carbon, where the electrically conductive carbon comprises carbon nanofibers, graphitic carbon, pyrolytic carbon or a combination. EXAMPLE - No suitable example given.