NOVELTY - The battery (1) has a positive electrode with a positive electrode active material, a negative electrode with a negative electrode active material, a separator, a fluidic electrolyte and a polymer layer. The portion of the polymer layer is provided between the separator and positive electrode active material and negative electrode active material. The fluidic electrolyte is provided in a void portion of positive electrode and negative electrode. The weight-average molecular weight of the polymeric material is 500,000 or more.    USE - Battery used in battery pack (claimed). Can also be used in electronic apparatus e.g. notebook computer, portable information terminal, cellular phone, cordless phone handset, video movie, digital still camera, electronic book, an electronic dictionary, music player, radio, headphone, gaming machine, navigation system, memory card, pacemaker, hearing aid, electric tool, electric shaver, refrigerator, air-conditioner, TV, stereo, water heater, microwave oven, dishwasher, washing machine, dryer, illumination apparatus, toy, medical apparatus, robot, road conditioner, signal apparatus.    ADVANTAGE - The non-fluidic electrolyte improves adhesiveness between electrodes, thus the fluidic electrolyte maintains high ion conductivity, and thus high battery characteristic is maintained even in a high-temperature environment or a low-temperature environment. The deformation of the electrodes is suppressed, and decrease in battery reactivity between the positive electrode and the negative electrode is suppressed. The current is blocked and thus abnormal heat generation due to an excessive current is prevented. The high ion conductivity due to the fluidic electrolyte which does not gelate is obtained while maintaining the close contact effect, thus the battery reactivity is improved.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a laminated film type battery using a laminated electrode portion.    Battery (1)    Positive electrode lead (2)    Negative electrode lead (3)    Adhesion film (4)    Exterior packaging portion (5)