NOVELTY - The device (100) has power storage elements (102) comprising a first body attached to a second body and a first electrode tab provided on a set of side portions of the second body, an electrode sheet over an electrolyte and the first body and beneath the second body. The first electrode tab is electrically connected to the electrode sheet. A second electrode tab of the power storage elements is electrically connected to a first electrode lead. The first electrode tab of the power storage elements is electrically connected to a second electrode lead.    USE - Sheet-like power storage device i.e. lithium secondary battery, for use in an electronic device (claimed) e.g. display device such as wristband-type display device, TV display and monitor, installation lighting device, air-conditioner, electric refrigerator-freezer and mobile phone. Can also be used in a desktop personal computer, laptop personal computer, word processor, still/moving image reproduction device, portable compact disk (CD) player, portable radio, tape recorder, clock, wall clock, cordless phone handset, transceiver, portable wireless device, car phone, portable game machine, toy, calculator, electronic notebook, electronic-book reader, electronic translator, audio input device, video camera, digital still camera, electric shaver, high-frequency heating appliance e.g. microwave oven, electric rice cooker, electric washing machine, electric vacuum cleaner, water heater, electric fan, hair dryer, humidifier and dehumidifier, and medical equipment i.e. dialyzer.    ADVANTAGE - The device allows a substrate to be formed using material e.g. polyethersulfone, having flexibility such that the device achieves high flexibility and is curved and bent. The power storage elements are sealed with an exterior body and a lid, so that the device has high reliability with respect to curvature and bend of the device. The power storage elements are provided with high resistance against entry of contaminant from an outside. The device allows anisotropic conductive paste, an anisotropic conductive film and resin material including metal particles to be utilized according to process temperature such that the power storage elements are electrically connected with a positive electrode lead and a negative electrode lead, so that the device having large capacitance is formed. The positive electrode lead and the negative electrode lead having comb-like shapes are provided to engage with each other such that the power storage elements are connected in parallel, so that the device is provided with higher capacity.    DETAILED DESCRIPTION - The first and second electrode tabs are positive and negative electrode tabs. The electrolyte is solid polymer electrolyte. An INDEPENDENT CLAIM is also included for a method for manufacturing a power storage device.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a sheet-like power storage device.    Sheet-like power storage device (100)    Flexible substrate (101)    Power storage elements (102)