Page 275 - Lindens Handbook of Batteries

ALKALINE-MANGANESE DIOXIDE BATTERIES 11.13

Anode cap

Gasket

Can
Separator
Anode
Cathode

FiguRE 11.7 Cross-section illustration of miniature alkaline-manganese dioxide battery. (Courtesy
of Energizer, Inc.)

11.4.2 Miniature Cell Configuration

A cross-sectional view of a miniature alkaline-manganese dioxide cell is shown in Fig. 11.7. Its
construction is similar to that of the cylindrical cell. There is a bottom cup that holds the cathode
pellet, followed by round disks of separator paper, the plastic seal, and the top cover containing
the anode mix. The top cover is pressed into the plastic seal, providing a leak-proof seal to prevent
leakage.
There are five common sizes of miniature alkaline cells; their dimensions are listed in Table 11.8.

TABLE 11.8 Dimensions of Miniature Alkaline Cells
Dimensions (mm)
A/B M N Φ
Designation Voltage Max. Min. Min. Min. Max. Min.
LR41 1.5 3.6 3.3 3.0 3.8 7.9 7.55
LR55 1.5 2.1 1.85 3.8 3.8 11.6 11.25
LR54 1.5 3.05 2.75 3.8 3.8 11.6 11.25
LR43 1.5 4.2 3.8 3.8 3.8 11.6 11.25
LR44 1.5 5.4 5.0 3.8 3.8 11.6 11.25
A/B = cell height; M = diameter of flat negative contact; N = diameter of flat positive contact;
Φ = diameter of the cell.
Source: IEC Int’l. Standard Part 2: Primary Batteries, 11th edition, 2006.

11.4.3 Battery Types and Sizes

The alkaline-manganese dioxide chemistry comes in a variety of cell sizes dictated by the many
different portable devices and their discharge characteristics. Figure 11.8 shows the cylindrical cell
sizes currently using the alkaline-manganese dioxide cell chemistry. While most cans are quite com-
mon and easily recognized, there are several that are not so common, e.g., the A, B, F, and G cell