Small-volume oral transmucosal dosage forms or NanoTabs\xae comprising a predetermined amount of a pharmaceutically active drug are provided. Wherein when the first internal battery is being charged by the detachable battery, the mobile communication device is operative by the second internal battery power. The light incident surface includes a first and second light incident sub-surfaces and a first end, wherein the second light incident sub-surface is oblique relative to the first light incident sub-surface.