MIL-PRF-8565K
b. The rated current of each heater control device shall be compatible with the current
specified in the applicable battery specification sheet.
c. Heater elements and wire assemblies shall be electrically insulated and installed in a
manner which minimizes potential battery damage due to electrical shorting, sparking, or other
electrical hazards.
d. All electrical switches, controls, circuits, and installations shall be explosion-proof. When
operating, they shall not ignite explosive mixtures of hydrogen and oxygen gasses generated
inside the battery container.
e. Both primary and secondary (backup) temperature limiting controls shall be incorporated
into the battery's electrical circuits to prevent overheating. If the primary heater control fails, the
battery shall not reach a damaging temperature.
f. All thermal switches shall be snap-action type in accordance with MIL-PRF-24236.
g. All heater components shall be located inside the battery container.
h. When the battery is operating in accordance with any specified environmental condition,
the exterior surface of the battery container shall not be greater than 75°C (167°F) due to the
heater operation.
3.6 Color and marking. The batteries shall conform to the requirements listed below and in
the applicable specification sheet when examined in accordance with 4.5.2.
3.6.1 Color. The battery shall conform to one of the following color styles (see 6.11.3 and
6.13):
a. The color under natural light of all visible parts of each battery, except the mounting
points, hold-down hooks, other external hardware, identification marking, and instructions, shall
conform to the range of colors listed in table I, according to whether the battery uses acid or
alkaline electrolyte; or
b. Color only the container cover and marking backgrounds in accordance with those listed
in table I under natural light; the rest of the container shall be white, gray, or black.
3.6.2 Polarity marking. The container body shall be conspicuously and durably marked "+"
in white in the location shown on the applicable specification sheet.
3.6.3 Identification marking. The battery identification marking shall be in white or black
print. Unless otherwise specified in the applicable specification sheet, the marking shall use a type
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