I also thought 40 pieces for less than 13 Euro is the Hammer! But the batteries are just scrap, unlike other low-cost batteries that life is perhaps 30 - 40% compared to other batteries. 1 For my Logitech mouse has held with other cheap batteries between 3-4 months and with the Varta (What brand batteries are actually) just 1 month! That says it all. I guess this here old stocks were bought. Well, now I'll try another cheap alternative ...