The button cell was in the delivery almost empty. She donated a clock only for 5 daily energy, then it was empty. Other cells functioned satisfactorily for months in this clock. The Online store Leipzig says that not the cell but the clock is faulty, in that cell was used. As they continue to be operated with another cell, is situated on the clock probably no defect before. It is simply the product which is not working properly, even if the trader, quote: "... received no further complaints from other shoppers ..." has.