Abstract: A lithium cell includes a casing, positive and negative electrodes within the casing, a separator between the electrodes, an electrolyte, a positive terminal connected to one of the electrodes, and a negative terminal connected to the other of the electrodes. The casing is aluminium with a plastic material coating on its inner surface to prevent contact between the aluminium casing and the internal active components of the lithium cell. At least one of the terminals includes a metal component secured to the aluminium casing. The metal component is less susceptible to lithiation than the aluminium of the casing.

Abstract: A golf stroke practicing aid which includes a target adapted to be struck by a golf-club, guiding means for constraining the target to move in a substantially horizontal orbit when struck, and measuring means for measuring the initial speed of the target when struck. A processing circuit is configured to determine a notional total distance that the target should travel in its orbit corresponding to said initial speed, and a motion controlling system serves to control the movement of the target in its orbit when struck such that the target actually moves a total distance which is substantially the same as the notional total distance.