Duracell Procell batteries are manufactured to rigid specifications to meet some of the highest standards of durability and longevity that professional users demand and expect. Increased battery life, longer service life, lower operating expenses, and an increase in productivity due to less man hours replacing batteries. Reliable operation in temperature between -4 to 129 degrees F. Contains no added mercury - no disposal issues. 10 year shelf life (each battery is individually date coded to ensure freshness and guaranteed fresh for 10 years). Color and style may Vary.