Within 7.2mm diameter of a H10 flat top, there is no component that would produce a short if a dented positive flat top were to touch it. But if the cell is dented enough, maybe the tallest ones could be crushed.
But I don’t think if it’s possible to dent it enough for that to happen considering the size of the button (4mm) relative to the size of the flat top and its thickness, that said adding 0.5mm to the button would probably have been a good idea.
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