MIL-B-49030A
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 First article. Batteries furnished under this specification shall be a product which has been tested, and passed
the first article tests specified herein.
3.3 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 I. 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
3.3.1 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.
3.3.1.1 Dissimilar metals. When dissimilar metals which would adversely affect battery performance are used in
intimate contact with each other, protection against electrolysis and corrosion shall be provided.
3.4 Electrolysis leakage. There shall be no evidence of electrolyte leakage on the external surfaces of the jackiet
at any time prior to or during the performance of test specified in 4.7.10, or any other tests specified herein.
Electrolyte leakage shall be considered to have occurred when a drop of phenolphthalein solution placed on the
battery turns pink or red.
3.5 Design and construction. Batteries shall be of the design, construction, physical dimensions, weight, and
polarity specified (see 3.1).
3.5.1 Battery voltage.
3.5.1.1 Open-circuit voltage. Unless otherwise specified, the open-circuit voltage shall not exceed the specified
3.5.1.2 Closed-circuit voltage. The closed-circuit voltage shall be not less than the voltage specified (see 3.1 and
4.7.8.2).
3.5.2 Insulating, impregnating, potting, and sealing compounds. The insulating, impregnating, potting, and sealing
compounds shall exclude moisture from insulating material without impairing its electrical characteristics. When
tested as specified in 4.7.1.1.1, the potting and sealing compounds shall not flow at high temperature (160 °F) nor
crack or draw away from the sides of a container at low temperature (-40 °F) or during any temperature change
between +160 °F and -40 °F sufficiently to impair electrical connections.
3.5.3 Filler or padding. Filler or padding shall be a cushioning electrically nonconducting material which maintains
its insulating characteristics under adverse environmental conditions.
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