NOVELTY - The battery (100) has a separator interposed between electrode plates of a wound type electrode assembly. A pouch case (120) is provided with the electrode assembly and an electrolyte. An electrolyte inlet (125) of the pouch case protrudes from an upper surface of the pouch case. Lead tabs (130) e.g. positive lead tab (131) and negative lead tab (132), of the electrode assembly are electrically connected to the electrode plates and protrude from the pouch case. The electrolyte inlet is sealed by a sealing portion (122) formed along an outer surface of the electrolyte inlet.    USE - Pouch type battery e.g. rechargeable secondary battery such as lithium-ion battery, for use in medium and large energy storage battery packs for supplying an electrolyte and power. Uses include but are not limited to a mobile electronic device such as digital camera, cellular phone and notebook computer, hybrid electric car, and industry application and household applications.    ADVANTAGE - The pouch case includes the sealing portion so as to prevent electrolyte from leakage. The battery combines positive electrode plates, separators, and negative electrode plates on top of each other so as to realize high output and large capacity battery. The lead tabs extend outwards from an upper surface of the pouch case, and each of the lead tabs are surrounded by a tab tape to increase the sealing performance of the pouch case and to electrically insulate the lead tabs from the pouch case. The device ensures that additional electrolyte inlet is included in the same direction as the direction of the positive lead tab and the negative lead tab, so that the additional space for including the additional electrolyte inlet is avoided. The battery can be stably operated for tens years by including the electrolyte inlet for supplying an electrolyte, and avoids the need to replace the old pouch type batteries with new pouch type batteries, thus reducing the maintenance costs of the packs.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for using a pouch type battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a front sectional view of a pouch type battery.    Pouch type battery (100)    Pouch case (120)    Sealing portion (122)    Electrolyte inlet (125)    Lead tabs (130)    Positive lead tab (131)    Negative lead tab (132)