MIL-PRF-49471/3A(CR)
minimum of 10 minutes. After discharge to zero volts on the IP capacity test,
batteries shall be force discharged with the two 12 volt sections connected in parallel
at 4.0 amperes constant current for a minimum of 10 minutes.
Overload test: Batteries shall be discharged in the 24 volt mode as described above
at 4 amperes.
Abuse test predischarge: Designated samples shall be discharged in the 24 volt mode
as described above at 2.0 amperes for 1.7 hours.
Abuse test, pulse discharge: Batteries shall be discharged in the 24 volt mode at 2.5
amperes for 1 minute followed by 1.8 amperes for 4 minutes, cycled continuously to
cut-off voltage.
For all capacity tests that end in P, except the HP and HTP, the batteries shall be
discharged with the two 12 volt sections connected in parallel at 4.0 amperes constant
current to cut-off volts (zero volts for the IP test). For the HP and HTP capacity tests the
batteries shall be discharged with the two 12 volt sections in parallel at 4.0 amperes
constant current for five minutes followed by open circuit for five minutes. This cycle
shall be repeated until the closed-circuit voltage reaches cut-off volts.
Closed-circuit voltage (Battery and cell string tests): Load resistance of 5.0 ohms shall be used
between socket holes 1 & 4 and 2 & 5. Voltage shall be 10.0 volts or greater within ten seconds.
Cell closed circuit test: Load resistance of 1 ohm shall be used. Voltage shall be above 2.0 volts
in 5 seconds.
Marginal notations are not used in this revision to identify changes with respect to the previous
issue due to the extent of the changes.
Custodian
Preparing Activity:
Army - CR
Army CR
(Project 6135-0417-03)
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