NOVELTY - A non-aqueous electrolyte battery comprises cladding material (2), and electrode group accumulated in cladding material. The electrode group comprises anode (5), negative electrode (3) including negative electrode active material, and separator (4). The electrode group is impregnated with non-aqueous electrolyte. The separator is formed paper chosen from cellulose and natural fiber pulp, and surrounded with positive electrode and negative electrode. The electrolyte battery has thermo-bonging resin regions at both ends, where portion which mutually overlaps is heat-sealed.    USE - Non-aqueous electrolyte battery such as lithium ion secondary battery, is used for battery pack (claimed) and as power supply for personal computer, video camera, mobile telephone, motor vehicle and electric vehicle.    ADVANTAGE - The non-aqueous electrolyte battery has excellent tensile strength. The battery pack comprising non-aqueous electrolyte battery has excellent durability and improved cyclic characteristics.    DETAILED DESCRIPTION - A non-aqueous electrolyte battery comprises cladding material, and electrode group accumulated in cladding material. The electrode group comprises anode, negative electrode including negative electrode active material which has lithium storage potential of 0.4V, and a separator. The electrode group is impregnated with non-aqueous electrolyte. The separator has elongated shape, and is formed paper chosen from cellulose and natural fiber pulp and surrounded with positive electrode and negative electrode. The electrolyte battery has thermo-bonging resin regions at both ends parallel to longitudinal direction, where the portion which mutually overlaps is heat-sealed. The negative electrode active material comprises lithium titanium oxide.    DESCRIPTION OF DRAWING(S) - The drawing shows sectional view of lithium ion secondary battery.    Cladding material (2)    Negative electrode (3)    Negative electrode layer (3b)    Separator (4)    Anode (5)