Review on Long-Lasting Power: Ultralast UL129VB 9V Alkaline Battery, 12 Pack by Kim Sanchez

I bought these thinking yes they are not Duracell or Energizer or even Rayovac. Not correct! I figured this would be a good opportunity to buy a pack of 12 batteries and replace all the smoke alarm batteries in my house. Most of them still come with their original Duracell batteries that I bought the house with 5 years ago. So after everything was replaced everything was fine one day. Then one started chirping, that annoying noise they make when their battery is low. I thought, well, a bad one. So I replaced it. Then a few days later another, then another, and so on. I don't know if I had a bad batch or what but out of the 7 or 8 I replaced only one works 3 MONTHS LATER!