I've never seen the vt133 in person, but several reviewers have shown how the mod will detach from the battery door if you hold on to only the former. Seems bad to me. Perhaps it was a flaw with preproduction samples?
Yeah I saw those videos. Who the hell carries their mods just by the battery cover and then shakes the hell out of it until the cover flies off? Normal people never uses their mods that way.