A battery terminal connector, especially for securement to the battery terminal post of an electrical storage battery. The battery terminal connector includes at least a body portion, a generally circular opening within that body portion for receiving the battery terminal post, and a horizontal bar extending transversely along the body portion. The connector further includes a movable lever for effecting two-way lateral movement of that horizontal bar. Lateral movement of the horizontal bar in one direction effects the opening of the generally circular opening, and lateral movement of the horizontal bar in a second direction effects the closing of the generally circular opening.