Nickel-cadmium waterproof rechargeable cylindrical elements are designated by the letters "KR" followed by a letter L, M or H, which indicates whether the element is designed for weak (L), medium (M) or strong ( H) V also by two groups of figures separated from each other by an oblique line. The first two figures to the left of the oblique line indicate the integer equal to or immediately greater than the maximum diameter specified for the element, expressed in millimeters. The two or three figures to the right of the oblique line indicate the integer equal to or immediately greater than the maximum height specified for the element, expressed in millimeters. If a manufacturer makes an element with tolerances that make it interchangeable with a battery, the latter's designation may also appear on the element. For example if applicable: