The 9V block are absolute junk. I have tested 6 of 20 and had no full charge. With two different battery testers I came to the conclusion that something is wrong there. My transmitter weather station is powered by a 9V battery. With the Varta batteries I got no contact with the base. Bought at Aldi, 2-pack 9V for 1.59, and even that worked. Brand batteries from Varta I as AA AAA us that are super, but this article is a disappointment. I have returned the package. Stay away from it.