I used these batteries for alarm with volumetric sensor without son, they usually take 6 to 8 months, there is already discharged in 3 months and I have to change it. I hope that the second battery pack will last longer. Really disappointed this product from a reputed brand like Duracell ... Second discharged battery in less than 3 months, the batteries are really very poor. Next time I would order the VARTA.
