NOVELTY - An aqueous electrolyte composition comprises a water-soluble polymer; aqueous electrolyte solution; and hydrophilic microparticles.    USE - As an aqueous electrolyte composition useful in a sealed-type primary film battery (claimed), e.g. digital TVs, home networks, robots.    ADVANTAGE - The aqueous electrolyte composition can prevent the evaporation of moisture contained in an electrolyte solution and is compatible with a separation film having resistance to a strongly acidic or basic electrolyte solution. The sealed-type primary film battery provides good ionic conductivity through shortened ion transfer paths defined by electrolyte layers filled in through-holes formed in a separation film. The sealed-type primary film battery has improved high-rate discharge characteristics, high output characteristics, and pulse output characteristics, and even when stored or discharged for a long time, undergoes no deterioration in battery performance, thus providing good long-term storage stability. In addition, since the through-holes formed in the separation film are used as ion transfer paths, it is possible to form the separation film using a material having good resistance to strong acid or base, and even when the batteries are used for a long time, deformation (e.g. corrosion or shrinkage) of the separation film is prevented, thus increasing the lifetime of the batteries. The separation film can also be made thinner, thus enabling manufacture of a thinner battery.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a sealed-type primary film battery (100) comprising a positive electrode (110); a negative electrode (120); a separation film (130) interposed between the positive and the negative electrode, where the film is separated from the positive and the negative electrode by predetermined distances, extending parallel to the positive and the negative electrode, and having several through-holes; and a non-flowable electrolyte layer (140) filled in a space defined between the positive and the negative electrode, where the electrolyte layer comprises a first electrolyte layer (142) which is interposed between the positive electrode and the separation film and extends parallel to the positive electrode, a second electrolyte layer (144) which is interposed between the negative electrode and the separation film and extends parallel to the negative electrode, and several third electrolyte layers which are filled in the through-holes of the separation film so as to be integrally connected to the first electrolyte layer and the second electrolyte layer.    DESCRIPTION OF DRAWING(S) - The figure shows a perspective view of part of a sealed-type primary film battery.    Sealed-type primary film battery (100)    Positive electrode (110)    Negative electrode (120)    Separation layer (130)    Non-flowable electrolyte layer. (140)