A vented, rechargeable nickel cadmium aircraft batteries and cells and harnesses used therein.

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MIL-PRF-49450B(CR)

manufacture. The date code shall be located on the cover of the cell. The numbers shall be 1/8

inches in height and black in color. For the low capacity cell the numbers shall be white in color.

3.6 Performance.

3.6.1 Capacity. When discharge of battery and cells is specified in this specification, the

battery and cells shall be discharged at the current rate specified in the applicable specification

sheet to the specified cut-off voltage for the test listed. The battery and cell capacity shall be

equal to the specified discharge current (amperes) multiplied by the discharge time above the

specified cut-off voltage (hours). The battery and cells shall provide the capacity specified in the

applicable specification sheets.

3.6.2 Environmental Requirements. The battery and cells when subjected to the

environmental tests in the verification tables shall show none of the following:

a. Dimensional distortion beyond specified limits or cracking of case or cover of either

cell or battery.

b. Radical current or voltage fluctuations during any test.

c. Mechanical failure of any part.

d. Electrolyte leakage or any spilling of electrolyte at any time during test. Venting of

gasses containing entrained electrolyte is permitted during charge.

e. Breakdown of insulation, stripping of metal plating from any component part,

corrosion of metal parts, or loosening of protective coating from the battery container or cover.

f. Deterioration of battery/cell identification markings.

3.6.2.1 Harness testing. The harness assembly when subjected to the temperature shock

test of 4.5.23 or alkali resistance test of 4.5.21 shall show none of the following:

a. Breakdown of insulation, stripping of metal plating from connectors, corrosion of

metal parts or cracking of potting compound.

b. Failure of thermistors to meet the requirements of 3.4.3.3.

c. Failure of thermoswitches to meet the requirements of 3.4.3.5.

d. Mechanical failure of components.

e. Dimensional distortion beyond specified limits.