So my batteries had a normal life, and I'm happy with it. My seller was then "Online store Leipzig". This time I try to use "Gina-energy-store". As will be shipped here from Amazon, I'm assuming that you do not get junk. Will update this review if necessary, if I cant fi bad goods receive.
I can only advise, immediately upon receipt on the date of manufacture (bottom of the battery) and the expiration date (printed on the side) to look, and to measure the voltage. This should at a new 9V block are about 9.6 V at idle!