NOVELTY - The battery (100) has an electrode terminal e.g. negative terminal (21) and positive terminal (22), passing through a cap plate (20), and electrically connected to an electrode assembly. An insulator e.g. negative insulator (31) and positive insulator (32), is connected between the electrode terminal and the cap plate, and electrically insulates the electrode terminal and the cap plate. An electrification switch (50) is fixed in the insulator. The electrification switch electrically connects the electrode terminal to the cap plate according to manipulation of the electrification switch.    USE - Rechargeable battery i.e. low-capacity rechargeable battery, for a small portable electronic device such as mobile phone, laptop computer and camcorder. Can also be used for a large-capacity battery that is used as a power source for driving motors of a hybrid vehicle.    ADVANTAGE - The cap plate and the case can be formed of stainless steel with electrical resistance that is greater than electrical resistance of aluminum, do that the rechargeable battery can reduce the amount of current that comes out of the positive terminal and reaches the conductor through the case when a conductor penetrates the electrode assembly through the case, thus improving characteristic of the rechargeable battery in the event of penetration by the conductor. The cap plate and the case can be formed of aluminum such that the cap plate and the case can be electrified with the negative polarity upon manipulation of the button, so that the rechargeable battery can reduce an electrification area of the positive electrode for generating electrons in a corrosion mode, thus improving corrosion resistance.    DETAILED DESCRIPTION - The cap plate and a case are made of aluminum.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a rechargeable battery.    Cap plate (20)    Negative terminal (21)    Positive terminal (22)    Negative insulator (31)    Positive insulator (32)    Electrification switch (50)    Rechargeable battery (100)