What is made available by the present invention is a battery, in which measures are taken to suppress a reduction in charge/discharge capacity and degradation of load characteristics due to peeling of an active material off the current collector during the use of the battery with charge/discharge operations repeated. An application of a boehmite treatment or a chromate treatment to the current collector surface of the electrode plate for the battery makes it possible for the degradation of charge/discharge capacity and load characteristics to be suppressed to a minimum. <IMAGE>
