Ensure that you have the correct charger designed specifically for nickel-cadmium batteries. Using the wrong charger can damage or even ruin your battery. So, double-check before proceeding. Next, connect the charger to a power source and make sure it is turned off. Then carefully insert the battery into the charging slot of the charger.
NiMH (nickel-metal hydride) and NiCad (nickel-cadmium) batteries are two of the most challenging batteries to charge properly and safely. These nickel-based batteries do not allow you to set a maximum charge voltage, so overcharging can result if you are unaware of the proper charging methods for nickel batteries.
NiCd batteries have two charging methods, one is constant voltage (boost +float) and other one is constant current .It is recommended to use Constant Voltage method of charging for Nickel Cadmium Batteries, usually with current limitation to C/5 or C/10. Charging voltages must be regularly checked.
Nickel cadmium battery chargers should cut the charge off when the temperature exceeds the maximum charging temperature, typically 45 degrees C for a controlled fast charge, and 50 degrees C for an overnight or fast charge.
There are different types of chargers available for nickel-cadmium batteries, including slow chargers and rapid chargers. Slow chargers take longer but provide a gentler charge and can help extend battery life. Rapid chargers offer quicker charging times but generate more heat which can reduce overall battery lifespan.
Overcharging can lead to reduced performance or even permanent damage to the battery. Always remember to disconnect and remove your fully charged nickel-cadmium battery from its charger promptly after completion of charging cycle; leaving them connected indefinitely will cause self-discharge and shorten their overall lifespan.