Duracell, one of the best-known manufacturers of batteries, offers many types of consumer-grade batteries, which it classifies by size and power (e.g., AA, AAA, C, and D). These batteries are ideal for household devices like remote controls, flashlights, clocks and toys. In addition, Duracell manufactures Procell AA batteries, which are appropriate for a variety of more demanding professional applications, from wireless microphones to blood pressure monitors.
Duracell's Procell AA batteries are alkaline-manganese batteries with an open circuit voltage ranging from 1.5 to 1.6 volts. According to Duracell, alkaline AA batteries have several advantages over other types (e.g., zinc-carbon cells); these advantages include higher energy density, longer shelf life, better leakage resistance, and better performance at the extreme temperatures that industrial, medical and military applications sometimes require.
Duracell states that its Procell AA batteries will operate in a temperature range of -4 to 130 degrees Fahrenheit (-20 to 54 degrees Celsius). This resistance to temperature extremes makes them reliable in a wide variety of climates, working conditions and applications.
Duracell's technical documentation for Procell AA batteries specifies a freshness guarantee of up to seven years. Tests show that the batteries will retain up to 85 per cent of their capacity after four years of storage at 70 degrees Fahrenheit (21 degrees Celsius). Each Procell AA battery carries a "use before" date that alerts consumers to the actual shelf life of the individual battery.
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