| 摘要 |
PROBLEM TO BE SOLVED: To accurately display the remainder of a battery even if the usage state of equipment body is frequently switched by multiplying discharge current information by the consumption power information of the equipment body for calculating the battery remainder information of a battery cell and displaying the battery remainder information. SOLUTION: A calculation circuit 23 calculates time until a battery ends using discharge current integration remainder and temperature dependence coefficients being transmitted to a communication circuit 22 and power dependence coefficients and remainder when the battery ends being stored in advance. Then, a display control circuit 24 generates battery remainder display information and displays it on a view finder 13 and a liquid crystal display panel 16. As a result, even if a user continuously opens or closes the liquid crystal display panel 16, the scattering of the remainder display of a battery appearing on the view finder 13 and/or the liquid crystal display panel 16 can be prevented.
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