Thinkpad x240, x250, x260, x270 internall battery dummy

So, i have this old thinkpad x240, but it's mising it's internal battery and the fact that there is empty space in the otherwise very well specced laptop greatly irritates me. I designed this dummy to fill the void in my thinkpad's heart. My idea is, that perhaps you could modify it to take an airtag, i think that would be a quite a neat way to install it. It may also be able to slightly help with the laptops rigidity but i am not sure about this, as i designed it only because of my perfectionalism. It was modeled by the real battery, as i have another same thinkpad that has the internal battery, so it should be quite precise, i tested it and it fits perfectly. This model might even work for some T series thinkpads, but i was unable to test it as do not have one of those. Do not question why the solidworks model has a beanz texture, my humor is very broken.