How To Recondition A Battery, How To Restore Nicad Batteries, How To Repair A Car Battery http://battery-reviver.info-pro.co What Makes Ni-Cd Rechargeable Battery Popular! Nickel-Cadmium or the Ni-Cd rechargeable batteries are a type of alkaline storage battery, classified as a secondary battery. As the name suggests, they are made from two chemical elements, nickel hydroxide, cadmium and an alkaline electrolyte, which is usually a solution of Potassium Hydroxide. Invented