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MIL-PRF-49471/5A(CR)

(2) Discharge:

Cells (forced discharge): Two cells shall be discharged at 2.0 amperes at 70+5oF

to 2.0 volts. Each discharged cell shall then be connected in series to one fresh

cell. Each string shall be discharged at 2.0 amperes at 70+5oF for a minimum of

3.0 hours.

Batteries: For all capacity tests, except the LR1, H and HT, the batteries shall be

discharged at 2.0 amperes constant current to cut-off volts. For the H and HT

capacity tests the batteries shall be discharged through 2.0 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. For the

LR1 test, batteries shall be discharged at 135 milliamperes to 4.5 volts, then at 1.1

watts to 1 volt.

Forced Discharge: After discharge to zero volts on the I capacity test, batteries

shall be force discharged at 2.0 amperes for a minimum of 5 minutes.

Overload test: Batteries shall be discharged at 4 amperes.

Abuse test predischarge: Designated samples shall be discharged at 2.0 amperes

for 1.75 hours.

Abuse test, pulse discharge: Batteries shall be discharged at 2.5 amperes for 1

minute followed by 1.8 amperes for 4 minutes, cycled continuously to cut-off

voltage.

Closed circuit voltage test (battery and cell string): Load resistance of 2.0 ohms shall be used.

Voltage shall be above 4.00 volts within 10 seconds.

Cell closed circuit voltage test: Load resistance of 1 ohm shall be used. Voltage shall be above

2.0 volts within 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 6135-0417-05)