Connection apparatus for a rechargeable battery

A battery connection apparatus on a rechargeable battery, in particular as power supply for a power tool, for releasably connecting the rechargeable battery to the power tool. The battery connection apparatus contains an outer frame and an inner frame, wherein the inner frame contains at least a first and second contact element and the outer frame contains a guide device for guiding an inner frame in at least one direction/plane, wherein the inner frame is positioned by at least one elastic element in a force-loaded manner at least in part in the guide device.