I bought the 20 Box AAA Ansmann batteries for the Christmas candles. This now burn since nearly two weeks every night about 6h. So far, no signs of fatigue are evident. But I'm used to from Ansman otherwise. I buy many years the batteries from Ansmann and am very satisfied. I think the 20's box really practical, even though it would have been better for environmental reasons cardboard. I would buy the RED batteries. The delivery of mobile-Energy was very quick. On the package could not be faulted.