Patent ID: 7135839

Claim:
A battery package comprising: a group of batteries having a plurality of connected batteries forming a secondary battery; a plurality of sensors for detecting a temperature and a voltage; a display device for displaying a condition of the secondary battery; a switch for controlling charge and discharge of the secondary battery; an operational control circuit for generating a signal based on signals input from the plurality of sensors to make the display device display the condition of the secondary battery and to activate the switch; and a refreshing demand display device for displaying a need to initiate a refreshing change and discharge, wherein the operational control circuit, which is provided with a non-detecting timer is for preventing the sensors from detecting a rapid rise of voltage of the secondary battery during a predetermined time period from beginning of the charge, wherein the operational control circuit counts a number of times that the voltage of the secondary battery does not exceed a preset voltage within the predetermined time period, and wherein the refreshing demand display device displays a need to initiate a refreshing charge and discharge when the counted number reaches a predetermined number.