Opet spominjem, koja je "kemija" baterija jer o tome ovisi kakav punjač ćeš tražit / napravit. Po poznatoj računici za NiCd sporo punjenje (C/10) ti treba generator konstantne struje 130 - 140 mA (1.3 Ah > 1300 mAh > 1300 mA / 10), napon treba biti 1.41 x broj čelija (da se zaključit po gabaritu batery pack - a, vjerojatno 10) > 14.1 - 16 V (nije kritično, bitno da je nešto veći od ukupnog napona paketa, mjeri se bez tereta).
Najlakše je da napraviš generator konstantne struje (current limiter) sa LM317, info možeš naći na xy mjesta, evo nekoliko:
The circuit (lower right) illustrates using a LM317 variable voltage regulator as a constant current source. The voltage between the adjustment terminal and the output terminal is always 1.25 volts, so by connecting the adjustment terminal to the load and placing a resistor (R) between the load and the output terminal, a constant current of 1.25/R is established. Thus we need a 12 ohm resistor (R) to get 100mA of charge current and a 1.2 ohm, 2 watt resistor for 1 amp of current. A diode is used in series with the input to prevent the batteries from applying a reverse voltage to the regulator if the power is turned off while the batteries are still connected. It's probably a good idea to remove the batteries before turning off the power.
NiCad Battery Charger
Preporućam da staviš fiksni otpornik (umjesto trimera), 1 W.
Ako nisi na ti sa elektronikom, nađi frenda / elektroničara da ti to složi.