What is a nickel-cadmium battery (NiCd)?
The nickel-cadmium battery was invented in 1899 and used commercially in the early 20th century. Its cost is more expensive than lead-acid batteries. Nickel-cadmium batteries usually have two types: sealed and open type. Smaller batteries are often sealed, while larger open-type batteries will be used in independent power supply systems. The self-discharge rate of nickel-cadmium […]