A battery terminal clamp has a body portion with an intermediate aperture for engaging a battery post. The clamp further includes a threaded rod extending upwardly relative to the body portion at an angle to the horizontal of between 45° and 60°. A battery pull bar extends from one side wall to the opposite side wall of the body portion. A wedge-shaped element abuts one side wall of the body portion. Together with the battery pull bar, the wedge-shaped element alternately effects a reduction in, or increase in, the size of the intermediate aperture.