Packaging unit for absorbent articles including a number of folded articles, the folded parts of the articles being arranged towards one of the sides of the packaging unit, but at different distances from the side. % with respect to oxides: ZrO2>92%, SiO2: 2 to 8%, Na2O: 0. A capacitor is connected in parallel with the electrolytic capacitor. Thus, reducingpreventing the undesirable alternate reaction between the two, which consumes the reactant making it unavailable for the production of the desired product. The method includes determining if an expected indicator signal is provided in the form of an overflow indicator or an underflow indicator. In some implementations, the redirected light may be applied to illuminate a display.