This application is based on and claims priority to Korean Patent Application No. 10-2016-0099135, filed on Aug. 3, 2016, Korean Patent Application No. 10-2016-0181362, filed on Dec. 28, 2016 in the Korean Intellectual Property Office, and U.S. application Ser. No. 15/392,044, filed Dec. 28, 2016, the disclosures of which are incorporated herein in their entirety by reference.

The present disclosure relates to mobile X-ray apparatuses including lithium ion batteries and methods of operating the mobile X-ray apparatuses.

X-rays are electromagnetic waves having wavelengths of 0.01 to 100 angstroms (?), and are widely used, due to their ability to penetrate objects, in medical apparatuses for imaging the inside of a living body or in non-destructive testing equipment for industrial use.

An X-ray apparatus using X-rays may obtain X-ray images of an object by transmitting X-rays emitted from an X-ray source through an object and detecting a difference in intensities of the transmitted X-rays via an X-ray detector. The X-ray images may be used to examine an internal structure of an object and diagnose a disease of the object. The X-ray apparatus facilitates observation of an internal structure of an object by using a principle in which penetrating power of an X-ray varies depending on the density of the object and atomic numbers of atoms constituting the object. As a wavelength of an X-ray decreases, penetrating power of the X-ray increases and an image on a screen becomes brighter.