Abstract: A thin electronic watch is provided in which a battery for powering the watch is positioned to underlie one edge of the liquid crystal display which gives the visible time output. In this way the battery can be of sufficient capacity to give a satisfactory life even when a sound alarm is provided and optionally also a back light for the display. The display has also the edge overlapped by the battery a central region devoid of electrical contacts so as to prevent the battery from interfering with these electrical connections to the display. To give a sound alarm the glass front of the watch is used as a loudspeaker and is mechanically linked to a piezo-electric crystal which is bonded to a substrate. Then by applying an oscillating electrical signal across the piezo-electric crystal this will be caused to flex and the resulting movement transmitted to the glass front.