1. A radiation detecting apparatus comprising: a radiation detector for detecting radiation applied from an external image capturing apparatus and transmitted through a subject and converting the detected radiation into radiographic image information; a battery for activating the radiation detector; a determining unit for determining whether image-capturing with respect to the subject is performed or not, and/or whether delivery of the radiographic image information from the radiation detector is performed or not; and a charging controller for controlling charging of the battery by an external charging apparatus based on a determination result by the determining unit.