Rechargeable Ni-Cd batteries are one type of alkaline storage battery and classified as secondary batteries. Ni-Cd battery has a positive electrode made of nickel hydroxide, a negative electrode made of cadmium, and an alkaline electrolyte. They are designed by IEC 285 as alkaline secondary cells and batteries "Sealed nickel-cadmium cylindrical rechargeable single cells".
A large variety of Ni-Cd batteries have been developed to meet a wide range of user needs, ranging from low current level usage like emergency power sources for semiconductor memories to very high power applications such as cordless drills, etc.

Features of different cell types

A. Long service life and economical 
The cell can provide more than 500 charge and discharge cycles. This makes it extremely economical, and provides an expected life similar to that of the device in which it is used.

B. Excellent discharge characteristics
The batteries have low internal resistance and high, flat voltage characteristics during strong current discharge, which ensures a wider application field.

C. Outstanding charge/discharge characteristics at high temperature.
The high temperature "H" type battery has a high trickle-charge efficiency even in temperature as high as 35 to 70

D. Long shelf life
The cells provide long storage life with few limiting conditions. It offers problem-free charge after long storage, permitting to use in a wide range of applications.

E. High-rate charging
For those applications that require it the cells can be quick charged or rapid charged in 1-2 hours. Ni-Cd batteries can be fully charged in 1.2 hours.

F. Excellent high-current discharge characteristics
The High rate discharge type (P Type) cells have about 90% at 6CmA discharge and 85% at 10CmA discharge for the rated capacity of 0.2 CmA discharge.

G. Wide-Temperature Range
The normal type cell can be used at extreme temperature. The high temperature type cells can be used at 70oC or more.

H. Reliable, self-resealing vent
Each cell is equipped with a self-resealing safety vent that provides safety and maintenance-free function. The cell can be used in any desired position during charge,
discharge or storage. Thanks to the special material in the gasket and our original liquid sealing compound, the occurrence of electrolyte leakage occurs very rarely.

I. Maintenance free
The General type cells have easy handling just like dry cells. Avoids overcharging or over discharging

C. Stable in performance
The battery is not sensitive to heat, and thus can be used in a wide temperature range.

J. Interchangeable with 1.5V dry cells
In the Consumer Type cells, though the nominal voltage is 1.2V, this battery can be used for 1.5V dry cell equipment without trouble.

K. Wide application field
Batteries with capacity from 100mA to 7,000mA are available. With four types available for general use as described below, the batteries can be applied in any cordless equipment.

L. High quality and reliability
Produced using a ISO 9000 certified quality control system.