MIL-B-18F
3. REQUIREMENTS
3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with the
applicable specification sheet. In the event of any conflict between the requirements of this specification and the
specification sheet, the latter shall govern.
3.2 Abbreviations. The abbreviations used herein are defined as follows:
D:
-
Delayed capacity.
EL
-
Electrolyte leakage.
JI
-
Jacket integrity test.
n
-
Number of batteries subjected to each capacity test in 4.6.1.4.
SLD
-
Minimum capacity value specified in 3.1 for the D test.
SLT
-
Minimum capacity value specified in 3.1 for the T Test.
T
-
Capacity after high-temperature storage.
-
Number of batteries in the sample with capacity values below SLD.
XD
XT
-
Number of batteries in the sample with capacity values below SLT.
3.3 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally
preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the
operational and maintenance requirements, and promotes economically advantageous life cycle costs.
3.4 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and externally. Tin
content of (product) and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent
lead, by mass (see 6.5).
3.5 First article inspection. Batteries furnished under this specification shall be a product which has been tested
and passed the first article inspection specified herein (see 4.5).
3.6 Materials and components. When a definite material or component is specified, it shall be in accordance with
the applicable specification or requirement listed in table II. When deemed necessary by the Government, certification
from the source of the material or component shall be required. In the absence of certification from the source, a
3.6.1 Metals. All metals, which do not enter into the basic electrochemical reaction of the cell, shall resist or be
treated to resist corrosion when subjected to any test or storage conditions specified herein.
3.6.1.1 Dissimilar metals. When dissimilar metals are used in intimate contact with each other, protection and
electrolysis and corrosion shall be provided.
3.7 Design and construction. Batteries shall be of the design, construction, physical dimensions, weight, and
polarity specified (see 3.1).
3.7.1 Dimensions. All dimensions shall include any coating which may be used, and shall remain within the
specified tolerances throughout the required tests.
3.7.2 Battery voltage.
3.7.2.1 Open-circuit voltage. Unless otherwise specified, the open-circuit voltage shall not exceed the specified
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