Patent ID: 7157880

Claim:
A battery monitoring system comprising: a camera powered by a first battery; a recording device which records an image data imaged by the camera and powered by a second battery, the recording device being operated in conjunction with the camera and separated from the camera; a first information generating portion that generates a first information indicating the remaining operating time of the camera by the first battery; a second information generating portion that generates a second information indicating the remaining operating time of the recording device by the second battery; an information selecting portion that compares the first information and the second information and selects and outputs at least one of the first information and the second information based on a predetermined condition; and a display section that displays at least one of the first information and the second information output from the information selecting portion, wherein: when the battery monitoring system is in a recording mode in which the recording device records the image data from the camera, the predetermined condition is made by selecting and outputting the lower one of the first information and the second information; and when the battery monitoring system is in a playing mode in which the image data recorded in the recording device is playing, the predetermined condition is determined by always selecting and outputting the second information.