ABSTRACT
The battery has become a common power source for many applications. There are two main types of batteries, and each of them has its own advantages and disadvantages: primary batteries and secondary batteries. Other portable rechargeable batteries include several "dry cell" types, which are sealed units and are therefore useful in appliances such as mobile phones and laptop computers. Cells of this type include nickel-cadmium, nickel-metal hydride (Ni-MHX) and lithium-ion cells. The voltage developed across a cell's terminals depends on the chemicals used in it and their respective concentrations. Various performance parameters of the Ni-MHX batteries such as electrochemical hydrogen storage capacity and cycle life were investigated and compared with theoretical hydrogen storage capacity. Composite hydrogen storage alloys based on magnesium or containing magnesium due to high hydrogen storage capacity, low weight, low cost may be the most effective materials for practical application in new Ni-MHX batteries.
