TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The substrate comprises: a copper bearing material, where at least one of the thicknesses of electrochemical cells is provided by cathode, electrolyte, anode, and current collectors, and the spatial region of each electrochemical cell is less than 50 cm2; and a polymer material, a polyethylene terephthalate, a glass, a mica, or other materials having mass density less than 1500 kg/m3. The first barrier layer comprises at least oxides, nitride, and phosphate of metal in groups 4,10,11,13 and 14 of the periodic table, where the barrier layer material comprises lithium complex of formula (LixPOy) (I). The cathode and the anode current collector are made of a conductive metal comprising an element in groups 10,11, and 13 of the periodic table, or are made of a copper material with electronic conductivity higher than 107 S/m. The cathode materials comprise amorphous or crystalline lithiated transition metal oxide and lithiated transition metal phosphate, where the metal is in groups 3-12 of the periodic table. The glassy electrolyte material comprises amorphous lithiated oxynitride phosphorus with ionic conductivity of 10-5-10-4 S/m. The anode comprises amorphous or crystalline lithiated metal/oxides, graphite, lithium or lithium metal, where the metal of lithiated metal/oxide is in groups 11-15 of the periodic table. The multiple layers of lithium electrochemical cells is configured with post or self terminated current collectors conforming to volume of at least a 20% increment of volumetric energy of 500 Watt-hours/l. The multiple layers of electrochemical cells is provided by physical vapor deposition in a sequence of: barrier-cathode current collector-cathode-electrolyte-anode-anode current collector-anode barrier repeated more than 100 times, but less than 3000 times; or cathode current collector-cathode-electrolyte-anode-anode current collector-anode-electrolyte-cathode-cathode current collector repeatedly more than 2 times of this sequence on top of substrate layer to reduce the number of layers of substrate and increase the volumetric energy density of the solid-state lithium battery.x+y = less than or equal to 7.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The device further comprises a volumetric energy density provided by a total operational energy under 1 Watts operational power divided by a total volume of the device. The device (d1) further comprises: a substrate, where the multiple layers of electrochemical cells disposed overlying the substrate, and the multiple layers are configured to form many electrochemical cells configured in a parallel arrangement or a serial arrangement using either a self terminated or post terminated connector configuration; and an energy density of greater than or equal to 500 Watt-hours/l. The spatial volume is less than or equal to 50 ccm for smartphone, tablet, and portable electronics. The multiple layers of electrochemical cells comprise greater than 100 and less than 3000 basic unit of electrochemical cells stacking up but electrically wiring in series or in parallel, where the basic unit of the electrochemical cell comprises of sequential layers, from the bottom to the top layer, of substrate or substrate-less, cathode current collector barrier layer having a layer thickness of less than 0.1 mu , cathode current collector having a layer thickness of 0.1-2 mu , cathode having a layer thickness of 0.2-2 mu , electrolyte having a layer thickness of 0.1-1 mu , anode having a layer thickness of 0.2-3 mu , anode current collector having a layer thickness of 0.1-2 mu , and anode barrier layer having a layer thickness of less than 0.1 mu .