SECTION IV. BATTERY, STORAGE BB-651/U

TM 11-6140-203-14-3

2-8. Weight and Dimensions of BB-501/U

Battery, Storage BB-50I/U (NSN 6140-00-134-0850) weighs approximately 32.5 pounds. The battery is 7 3/16

inches long, 63/4 inches wide and 7/16 inches high. Refer to figure 2-7 for parts location and BB-613/U (cell)

layout. The BB-613/U (cell) (NSN 6140-00-134-0849) is 5 3/4 inches high, 2¼ inches wide, and 1 inch deep and

weighs 11/8 pound.

SECTION IV. BATTERY, STORAGE BB-651/U

2-9. Tabulated Data For BB-651/U (fig. 2-8)

Temperatures between

Type ................................

Nickel-cadmium.

0°F. (-17.8°C.) and

Number of cells ...............

20 (four 5-cell monoblocks).

-40°F. (-40°C.) ......... 1.1amperes for approximately 3

Type of cell .....................

BB-547/U (5 cell monoblock).

hours.

Electrolyte ......................

Potassium hydroxide (KOH), 31

Voltage:

percent (by weight) in distilled

Open circuit .............. Approximately 26 volts(battery

water.

fully charged, with a 24-hour

Operating Range:

rest period).

Temperature ............. -40°F. (-40°C.) to 125°F.

At rated load of 1.1 amperes:

(51.7°C.).

Temperatures between

Atmospheric pressure..... Sea level of 10,000 feet (20.6

75°F. (23.9°C.) and

inches of mercury 0.1 inch).

85°F. (29.4°C.) ........ 24 volts for approximately 5

Storage:

hours.

Duration ................... Unlimited, regardless of state of

Temperatures between

charge.

0°F. (-17.8°C.) and

Temperature .................... -65°F. (-53.9°C.) to 165°F.

-40°F. (-40°C.) ......... 23 volts for approximately 3

(73.90 C.).

hours.

Atmospheric pressure..... Sea level to 50,000 feet (3.4 inch

Intercell connector:

of mercury 0.1 inch).

Material ..................... Nickel.

Electrical Data: ................

Quantity ................... 18.

Rating ..................... 5.5 ampere-hours.

Cell plate materials:

Current at rated load of 1.1

Positive plate (charged)..Nickel oxide.

amperes:

Negative plate (caged)......Cadmium.

Temperatures between

Separator material.............Nylon cellophane sandwich.

0 F. (-17.8°C.) and

Monoblock case materials....Acrylonitrile-ButadieneStyrene

125 F. (51.70 C.)

1.1 ampere for approximately 5

(ABS).

hours.

2-7