MIL-PRF-49471/2A(CR)
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 160 milliamperes to 10.5 volts, then at 2.75 watts
to 1.5 volts.
Forced Discharge: After discharge to zero volts on the I capacity test, the batteries
shall be force discharged at 2.0 amperes for a minimum of10 minutes.
Overload test: Batteries shall be discharged at 4 amperes.
Abuse test predischarge: Designated samples shall be discharged at 2.0 amperes
for 1.9 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: Closed-circuit voltage measurements shall be made with a direct
current voltmeter of proper range and sensitivity (see basic specification), using load resistance
as shown in the following table:
UNIT RESISTANCE MINIMUM PERMISSIBLE VOLTAGE
A1 6.5 ohms, + 1% 1.9 volts
A2 5.0 ohms, + 1%
10.0 volts (this applies to cell strings as well)
Voltage shall be above "MINIMUM PERMISSIBLE VOLTAGE" within ten (10) seconds after
load is applied.
Cell closed circuit voltage test: Load resistance of 1 ohm shall be used. Voltage shall be above
2.0 volts in 5 seconds.
Socket strength test (First Article only): Before conducting the complete discharge test, the five
batteries shall be subjected to the following:
Using a 0.250 +0.050 inch diameter rod, apply a force to the center of the socket and deflect
it downward a distance of 0.250 +0.0625, -0 inch below the top surface of the battery.
Battery Label (only for this battery):
"DO NOT CHARGE, SHORT CIRCUIT, INCINERATE, MUTILATE OR TEST WITH U-
410 ADAPTER OTHERWISE BATTERY MAY VENT OR RUPTURE RELEASING TOXIC
MATERIALS"
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