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Comparison of Zinc-Carbon and Zinc-Alkaline
The following two figures compare the DURACELL®
Alkaline Manganese Dioxide system and several other zinc anode systems,
showing the effect of temperature on both gravimetric energy density
and volumetric energy density.
Figure 1
Gravimetric Energy Density
Gravimetric energy density comparison of zinc anode systems.
Figure 2
Volumetric Energy Density
Volumetric energy density comparison of zinc anode systems.
The following chart shows the effect of discharge load on the cell’s
capacity and how this can influence the selection of a battery for
an application. The regular zinc-carbon cell performs efficiently
under light discharge loads, but its performance falls off sharply
with increasing discharge rates. The alkaline system has a higher
energy density at light loads and does not drop off as rapidly with
increasing discharge loads. For low-power applications, the service
ratio of alkaline compared to regular zinc-carbon is in the order
of 2:1. At heavier loads, such as those required for toys, motor-driven
applications, and pulse discharges, the ratio can widen to 8:1 or
greater. At these heavy loads, alkaline batteries are preferred on
both a performance and cost basis.
Figure 3
Effect of Discharge Load on Capacity
Comparison of the typical discharge characteristics of regular
zinc-carbon “D” and “AA” size cells versus DURACELL
alkaline “D” (MN1300) and “AA” (MN1500) size cells.
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