I bought this pack. I buy only because the Duracell batteries are used for smoke detectors etc where it depends on long standby time. Normally, the batteries should last min. 1 year. This delivery was absolutely inferior, almost all the batteries were empty after 2 weeks. A few are even expired. This is so far just never happened at Duracell. I'll have to check the batteries at Procter & Gamble whether really genuine Duracell are. This is something I'm not used by Duracell !!