1.5.1.2.1.5.2 Suitable batteries
Primary cells with a nominal voltage of 3.6 V or more are recommended. These are available for moderate as
well as for extended temperature range (e.g. 125 °C). Suitable cells are mainly based on lithium thionyl
chloride (LiSOCL2). They feature high energy density, high output voltage stability and operating life up to 25
years. The self-discharge per year is typically in the range of 1 %.
Form
Factor
Description
1/2 AA A cylindrical cell with 25.2 mm length and 14.5 mm diameter. Nominal capacities up to 1.2 Ah
are available.
1/6 D A flat wafer cell, comparable to a coin cell. Diameter 32.9 mm, height 10.2 mm. Nominal
capacities up to 1.7 Ah are available.
1/10 D A flat wafer cell, comparable to a coin cell. Diameter 32.9 mm, height 6.5 mm. Nominal
capacities up to 1.0 Ah are available.
2450 A flat wafer cell, comparable to a coin cell. Diameter 24.5 mm, height 5.8 mm. Nominal
capacities up to 0.55 Ah are available.
ER22G75,
BEL Wafer
A flat wafer cell. Diameter 22.8 mm, height 7.5 mm. Nominal capacities up to 0.42 Ah are
available.
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