Battery

A battery capable of being removably mounted in a coupling surface of a video camera or in an adapter plate mounted in said coupling surface and capable of being joined to a second battery having a structure corresponding to that of said battery, said battery comprising a front cover and a rear cover and a battery pack enclosed by said covers, said rear cover being provided with a substantially V-shaped recess in its surface, said V-shaped recess having a top portion formed by a V-shaped engagement plate having a dovetail cross-section, and said rear cover being provided with a pair of vertically extending guide grooves provided adjacent outside edges of said rear cover above said V-shaped engagement plate;

• said front cover being provided with a V-shaped protrusion on its surface corresponding to the V-shaped recess in said rear cover and a pair of guide projections provided adjacent outside edges of said front cover and opposite the guide grooves provided in said rear cover, said guide projections sandwiching a pair of signal terminal parts, said V-shaped protrusion having a V-shaped receiving groove for receiving and forming a dovetail joint with a V-shaped engagement plate of said second battery and corresponding to a V-shaped receiving groove provided in the coupling surface or in the adapter plate mounted in the coupling surface of the video camera to which said battery is to be mounted and said pair of guide projections being adapted to be inserted into said pair of guide grooves.