In this study, all-solid-state In/LiCoO2 cells were assembled using 0.01Li(3)PO(4)-0.63Li(2)S-0.36SiS(2) sulfide glass electrolytes. The cells showed high initial charge and discharge capacities of 194 and 169 mAh/g, with 87% efficiency at a fixed current density, 9.5 mA/g, between 2.0 and 4.1 V. The average discharge voltage was low, 3.22 V, but the energy density was 542 mWh/g: higher than the 462 mWh/g of liquid C/LiCoO2 cells. An In/LiCoO2 cell was discharged at -40 degrees C (39 mAh/g at 2.4 mA/g) from 3.9 to 1.5 V. Although the suppression of capacity fading is required, its attractive electrochemical properties resemble lithium-ion batteries.