Either the batteries were already empty, or after 2 days later than the devices reported back the battery level "empty".
These batteries are not recommended because they do not hold what promises to be a standard battery of the brand "VARTA".
Following the purchase of CR2032 batteries at Conrad Geraäte work again (eg bicycle speedometer, scales, etc.).
Seller claims that its batteries are best quality and my equipment are defective. Kommisch but that the devices run with new batteries of Conrad since four weeks properly.
Attention, not recommended !!!