A NiCd battery, or nickel-cadmium battery, is a type of rechargeable battery that uses nickel oxide hydroxide and cadmium as its electrodes. Known for their durability and ability to deliver high discharge rates, these batteries are commonly used in portable electronics, power tools, and emergency lighting systems. One of the key features of NiCd batteries is their ability to withstand deep discharges without significant damage. However, they are less environmentally friendly due to the presence of cadmium, a toxic heavy metal. As a result, proper disposal and recycling are essential to minimize environmental impact.