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When all cells are at 1.55 volts minimum, reduce charge current to the topping charge rate and
top charge for one hour. Adjust electrolyte during the final 15 minutes of the topping charge in
accordance with Paragraph 6.0. Upon completion of the topping charge, while still on charge, all
cell voltages must be from 1.55 volts minimum to 1.75 volts maximum.
− If cell voltages are from 1.55 volts minimum to 1.75 volts maximum, proceed to Paragraph
7.0.
− If cell voltages are greater than 1.75 volts, one reconditioning cycle should be performed. If
cell voltage is greater than 1.75 following the recharge, the cell should be replaced. Proceed
to Paragraph 8.0 for reconditioning or Paragraph 10.0 for cell replacement.
− If any cell rises to 1.55 volts then decreases below 1.50 volts the cell must be replaced.
MarathonNorco Aerospace, Inc.
OPERATING and MAINTENANCE MANUAL
NICKEL-CADMIUM AIRCRAFT BATTERIES
24-34-00 Page 502
APR 15/06
STEP IA Connect battery to charging source and charge at the main charge rate a MINIMUM
of two and one-half (2½) hours and until all cells are 1.55 volts minimum.
IF CELL(S) ARE DRY, HIGH CELL VOLTAGE MAY OCCUR (1.76 VOLTS OR
GREATER). FIVE TO TEN CC’s OF DISTILLED OR DEMINERALIZED WATER MAY
BE ADDED TO EACH CELL.
After completion of the main charge with all cells at 1.55 volts minimum, reduce charge current to
the topping charge rate and top charge for two (2) hours. Adjust electrolyte level during the final
15 minutes of the topping charge in accordance with Paragraph 6.0. Upon completion of the
topping charge while still on charge, all cell voltages must be from 1.55 volts minimum to 1.75
volts maximum.
or
For charging with a reflex charger, charge at the reflex charge rate for 1 hour followed by a
constant current topping charge for 2 hours. Adjust the electrolyte level during the final 15
minutes of the topping charge. The requirements below are applicable to the topping charge.
⎯ If cell voltages are 1.55 volts to 1.75, proceed to Paragraph 7.0.
⎯ If any cell voltage is greater than 1.75 volts, the cell must be replaced, proceed to Paragraph
10.0.
⎯ If any cell voltage rises to 1.55 volts and then decreases below 1.50 volts, the cell must be
replaced, proceed to Paragraph 10.0.
⎯ If any cell voltage fails to rise to above 1.50 volts, the cell must be replaced. See Paragraph
10.0
MarathonNorco Aerospace, Inc.
OPERATING and MAINTENANCE MANUAL
NICKEL-CADMIUM AIRCRAFT BATTERIES
24-34-00 Page 503
APR 15/06
Reflex and Constant Current Charging Rates
CELL
TYPE
REFLEX CHARGING CONSTANT CURRENT CHARGING
1 HOUR TRICKLE
REFLEX MODE MAIN CHARGE TOPPING CHARGE CHARGE RATE
AMPS AMPS AMPS MILLIAMPS
3H120 6 1.8 0.8 6
5H120 10 3.2 1.3 10
10H120 20 6.5 2.6 20
12H120 24 7.5 3.0 24
12M220 24 7.5 3.0 24
14M220 28 8.5 3.4 28
15M220 26 8.5 3.4 26
17H100 34 9.0 3.6 34
17SP100 34 9.0 3.6 34
18H120 34 9.0 3.6 34
20SPE100 40 14.0 5.6 40
20H120 40 11.0 4.4 40
24H100 48 13.0 5.2 48
24SP100 48 13.0 5.2 48
24H120 48 13.0 5.2 48
24M220 48 13.5 5.4 48
24ME220 48 13.5 5.4 48
28SP100 56 15.0 6.0 56
36H120 80 21.0 8.4 80
38H100 76 23.0 9.2 76
38SP100 76 23.0 9.2 76
40SP100 80 23.0 9.2 80
40SP100L 80 23.0 9.2 80
44SP100 80 24.0 9.6 88
44SP100L 80 24.0 9.6 88
46SPE100 80 24.0 9.6 92
52H120C 80 30.0 12.0 104
65H120 80 32.5 13.0 120
81H120 80 42.5 17.0 160
TABLE 4
REFLEX and CONSTANT CURRENT CHARGE PROCEDURES
MarathonNorco Aerospace, Inc.
OPERATING and MAINTENANCE MANUAL
NICKEL-CADMIUM AIRCRAFT BATTERIES
24-34-00 Page 601
APR 15/06
6.0 ELECTROLYTE LEVEL ADJUSTMENT
During the last 15 minutes of the topping charge, and while the current is still flowing, the cells are at their
most uniform electrolyte level, and it is at this time that the electrolyte level can be most accurately
adjusted.
The electrolyte level should be adjusted using the syringe and appropriate nozzle (available in kit P/N
32480-001).
Electrolyte level adjustments must be made with distilled, deionized or demineralized water only
FIGURE 4
SYRINGE AND NOZZLE ASSEMBLY
SYRINGE & NOZZLE ASSEMBLY
APPLICATION
TABLE 5
ITEM #1
SYRINGE
P/N
ITEM #2
NOZZLE P/N
NOZZLE
LENGTH
(L1)
NOZZLE
COLOR
CELL TYPE
32415-001 32479-001
32479-002
32479-003
32479-004
7/8” (22mm)
1-1/16” (27 mm)
5/8” (16 mm)
2” (51 mm)
Green
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Operating and Maintenance Manual For Nickel-Cadmium Aircraft(12)
