DURACELL PROCELL DPRST 1.5 V Alkaline D Battery\r\n- These Duracell Industrial Procell Alkaline 'D' Batteries are supplied in a pack of 10 batteries.- They provide high-performance power and are designed for professional and industrial purposes, delivering long-lasting power across a range of applications. - The recommended operating temperatures are between a minimum of minus 20C and a maximum of 54 Celsius.