Specifications

MARATHONNORCO AEROSPACE, INC.
NICKEL-CADMIUM AIRCRAFT BATTERIES
24-34-00
Page 502
APR15/06
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