A device for the in situ analysis of batteries (1) by means of X-ray, synchrotron or another radiation, having a sample support (5), which is embodied as a sample wheel rotatably mounted about the centre axis (55), which sample wheel has a plurality of sample holders, the centre points of which are arranged on a common circular line about the centre point of the sample support (5), wherein each sample holder can be repeatedly opened and closed individually by an arrestable cover (4), and the sample holder has in its interior a cavity which receives the battery (1), which is to be examined, in a manner ideal in shape with regard to circumference, wherein the cover (4) and the cavity have an unclosed or covered opening for the passage of the beam, and a spring (2), engaging in the edge region of the battery (1), presses the battery (1) against the cover (4), wherein the spring (2) and the edge region of the cover (4) are embodied so as to be electrically conducting but insulated with respect to one another, characterized in that there are directed from each sample holder an electrically conductive connection (6) from the edge region of the cover (4), and an electrically conductive connection by means of the spring (2) onto the face of the sample support (5) facing away from the cover (4) and from there into the vicinity of the centre point of the sample support (5), and the lines of all sample holders are combined there to form a line bundle or a plug connector (8).