Patent ID: 7783321

Claim:
A cell phone device comprising: a first housing; and a second housing separable from the first housing; wherein the first housing includes a display means, an imaging operation means, a first local communication means, a first battery and a first control means; the second housing includes an imaging means, a second local communication means, a second battery and a second control means; the second control means transmits image data generated by the imaging means to the first local communication means via the second local communication means and outputs the image to the display means; and the first control means records the image data generated by the imaging means based on an imaging instruction input to the imaging operation means, wherein the first control means acquires a charge state of the first battery, the second control means acquires a charge state of the second battery, and a charge ratio of the first and second batteries is calculated and when the first and second housings are connected, power is drawn from the battery with the greater charge until the batteries have substantially the same charge, and when the first and second batteries are being charged precedence is given to the battery with a weaker charge.