A-A-55439A
3. SALIENT CHARACTERISTICS.
3.1 Interface and physical dimensions. Batteries supplied to this CID shall be as specified herein and
shall meet the requirements of SAE J537.
3.2 Containers. Containers shall be free of leaks, cracks, or other defects that would adversely affect
performance. Containers shall be of one piece construction and shall be made of non-absorbent acid-
resistant, hard rubber or polypropelene plastic.
3.2.1 Electrical breakdown. At a temperature of 80ºF (26.6 ºC) the container walls and partitions shall be
capable of withstanding for 5 seconds a voltage of 100V/mil of wall thickness for hard rubber containers,
300V/mil of wall thickness for plastic containers, (30,000 volts maximum for either hard rubber or plastic)
without being perforated or burned through.
3.2.2 Acid resistance. Specimens of the container material shall be capable of being immersed in
sulfuric acid at 150 ºF (65.5 ºC) for a period of 28 days without increasing in weight by more than 1.5
percent, increasing dimensionally by more than 2 percent, or blistering, cracking, or showing other visible
damage.
3.2.3 Impact resistance, hard rubber containers. At a temperature of 80ºF (26.6 ºC) the container shall
be capable of withstanding, without damage, the impacts from a 2 pound (.907 Kilogram (kg)) steel ball
dropped on the spans of the container positioned horizontally, with the minimum impact resistance
specified in table II. The points of impact and number of impacts shall be as specified in the BCI Battery
3.2.4 Impact resistance, plastic containers. At a temperature of 80ºF (26.6 ºC) the plastic containers
shall be capable of withstanding, without damage, the impact resistance tests entitled "Plastic Container
and Cover Testing Procedures" in the BCI Battery Technical Manual, with the minimum impact resistance
specified in table II.
TABLE II. Container impact resistance.
Minimum impact resistance
Battery class
Hard rubber container
Plastic container
Classes 1, 3, 5, 6, and 7
12 inch/pound (1.36 newton
50 inch/pound (5.65 N m)
meters (N m)) average for all
average for all spans.
spans.
No single impact failure below
No impact failure below 8
35 inch/pounds (3.95 N m).
inch/pound (0.90 N m).
Classes 2 and 4
20 inch/pound (2.26 N m)
75 inch/pounds (8.47 N m)
average all spans.
average for all spans.
No impact failure below16
No single impact failure below
inch/pounds (1.81 N m).
50 inch/pounds (5.65 N m).
3.2.5 Bulge resistance, hard rubber containers. The hard rubber containers shall be capable of
maintaining bulge resistance when filled with water to within .625 inch (15.88 mm) from the top, having
the water heated to 158 ºF (70º C) and held at that temperature for 3 hours, and letting the water
gradually return to 75º F (23.8º C) over a period of 10 hours minimum. Maintaining bulge resistance will
be evidenced by the container not increasing in any dimension by more than .063 inch (1.59 mm) from
measurements taken at 75º F (23.8º C) prior to filling it with water.
3.2.6 Bulge resistance, plastic containers. The containers shall be capable of maintaining bulge
resistance when tested as specified in the "Plastic Container and Cover Testing Procedures" of the BCI
Battery Technical Manual at a test temperature of 80 ºF (26.66 ºC).
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