MIL-PRF-49471/9A(CR)
Initial voltage delay: When the battery is subjected to any of the capacity tests, initial closed-
circuit voltages below 4.0 volts cannot exceed a 0.1 second duration.
METHOD OF EXAMINATION AND TESTS:
Capacity Tests:
(1) Storage:
Details on storage conditions for all specified
capacity tests are described in basic
specification.
(2) Discharge:
Cells (forced discharge): One cell shall be discharged at 4.5 milliamperes at
o
70+5 F to 2.0 volts. Each discharged cell shall then be connected in series to one
o
fresh cell. Each string shall be discharged at 4.5 milliamperes at 70+5 F for 100
hours.
Batteries: Batteries shall be discharged at 4.5 milliamperes to cut-off voltage
(zero volts for I test).
Forced discharge: After discharge to zero volts on the I capacity test, batteries
shall be force discharged at 4.5 milliamperes for a minimum of 5 minutes.
Abuse test, predischarge: Designated samples shall be discharged at 4.5
milliamperes for 50 hours.
Abuse test, pulse discharge: Batteries shall be discharged at 5.5 milliamperes for 1
minute followed by 4 milliamperes for 4 minutes, cycled continuously to cut-off
voltage.
Closed circuit voltage test:
Battery & cell string: Load resistance of 298.2 ohms shall be used.
Voltage shall be above 5.0 volts within 10 seconds.
Cell: Load resistance of 150 ohms shall be used. Voltage shall be above 2.0 volts
in 5 seconds.
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