A mobile device for treating lithium-ion batteries comprising: 1.1 a feed chamber, wherein 1.1.1 lithium-ion batteries can be received in the feed chamber; 1.2 a comminuting device, wherein 1.2.1 the lithium-ion batteries received in the feed chamber can be conveyed from the feed chamber to the comminuting device and 1.2.2 the lithium-ion batteries conveyed to the comminuting device can be comminuted by the comminuting device; 1.3 an intermediate input container, wherein 1.3.1 the lithium-ion batteries comminuted by the comminuting device can be conveyed from the comminuting device to the intermediate input container and 1.3.2 the comminuted lithium-ion batteries conveyed to the intermediate input container can be received in the intermediate input container; 1.4 a rotary kiln, wherein 1.4.1 the comminuted lithium-ion batteries received in the intermediate input container can be conveyed from the intermediate input container into the rotary kiln, 1.4.2 the rotary kiln can be electrically heated and 1.4.3 the comminuted lithium-ion batteries conveyed into the rotary kiln can be thermally treated by the rotary kiln; and 1.5 an output conveying facility, wherein 1.5.1 the comminuted lithium-ion batteries thermally treated in the rotary kiln can be conveyed out of the rotary kiln by the output conveying facility. 1.1 a feed chamber, wherein 1.1.1 lithium-ion batteries can be received in the feed chamber; 1.1.1 lithium-ion batteries can be received in the feed chamber; 1.2 a comminuting device, wherein 1.2.1 the lithium-ion batteries received in the feed chamber can be conveyed from the feed chamber to the comminuting device and 1.2.2 the lithium-ion batteries conveyed to the comminuting device can be comminuted by the comminuting device; 1.2.1 the lithium-ion batteries received in the feed chamber can be conveyed from the feed chamber to the comminuting device and 1.2.2 the lithium-ion batteries conveyed to the comminuting device can be comminuted by the comminuting device; 1.3 an intermediate input container, wherein 1.3.1 the lithium-ion batteries comminuted by the comminuting device can be conveyed from the comminuting device to the intermediate input container and 1.3.2 the comminuted lithium-ion batteries conveyed to the intermediate input container can be received in the intermediate input container; 1.3.1 the lithium-ion batteries comminuted by the comminuting device can be conveyed from the comminuting device to the intermediate input container and 1.3.2 the comminuted lithium-ion batteries conveyed to the intermediate input container can be received in the intermediate input container; 1.4 a rotary kiln, wherein 1.4.1 the comminuted lithium-ion batteries received in the intermediate input container can be conveyed from the intermediate input container into the rotary kiln, 1.4.2 the rotary kiln can be electrically heated and 1.4.3 the comminuted lithium-ion batteries conveyed into the rotary kiln can be thermally treated by the rotary kiln; and 1.4.1 the comminuted lithium-ion batteries received in the intermediate input container can be conveyed from the intermediate input container into the rotary kiln, 1.4.2 the rotary kiln can be electrically heated and 1.4.3 the comminuted lithium-ion batteries conveyed into the rotary kiln can be thermally treated by the rotary kiln; and 1.5 an output conveying facility, wherein 1.5.1 the comminuted lithium-ion batteries thermally treated in the rotary kiln can be conveyed out of the rotary kiln by the output conveying facility. 1.5.1 the comminuted lithium-ion batteries thermally treated in the rotary kiln can be conveyed out of the rotary kiln by the output conveying facility.