NOVELTY - A battery pack comprises a non-aqueous electrolyte secondary battery (50) containing battery element including anode, cathode, and separator, and flexible covering component containing laminated film (I) (57) which covers the battery element. The laminated film (I) comprises heat-bonding layer (A), metal layer (C), and outer covering layer (E). The rigid covering component covers the non-aqueous electrolyte secondary battery together with the flexible covering component. A protection circuit board is housed in the rigid covering component.    USE - Battery pack for non-aqueous electrolyte secondary battery such as lithium secondary battery for portable electronic device such as camera, cellphone, and laptop computer.    ADVANTAGE - The battery pack has improved impact resistance, shock resistance and strength.    DETAILED DESCRIPTION - A battery pack comprises a non-aqueous electrolyte secondary battery containing battery element including anode, cathode, and separator which are spirally wound or stacked, and flexible covering component containing laminated film (I) which covers the battery element. The separator is disposed between the anode and cathode. The battery element includes a non-aqueous electrolyte composition. The laminated film (I) comprises heat-bonding layer (A), metal layer (C), and outer covering layer (E) which are laminated. The flexible covering component is sealed through the battery element while leaving electrode terminals of the anode (55a) and cathode (55b) which are extended to outside of the battery element. The rigid covering component covers the non-aqueous electrolyte secondary battery together with the flexible covering component. The rigid covering member has laminated film (II) (41) comprising heat-bonding layer (B), metal layer (D), and outer covering layer (F) which are laminated. A protection circuit board is housed in the rigid covering component which controls the voltage and current of the non-aqueous electrolyte secondary battery. The battery element and the flexible covering component are adhered to each other, and the flexible covering component and rigid covering component are bonded by melting the heat-bonding layer (B) without melting the outer covering layer (E). The metal layer (D) comprises metal chosen from aluminum, copper, iron, stainless steel, and nickel or iron plated with metal chosen from tin, zinc and nickel.    DESCRIPTION OF DRAWING(S) - The drawing shows the cross-sectional view of the structure of battery assembly in battery pack.    Laminated film (41,57)    Battery (50)    Anode terminal (55a)    Cathode terminal (55b)    Recessed portion (57a)