nikkelkadmium

Nickel-cadmium (NiCd) batteries are a type of rechargeable battery that uses nickel oxide hydroxide as the cathode and metallic cadmium as the anode. They were one of the first rechargeable battery types to be commercially produced and have been widely used in various applications, including portable electronics, power tools, and electric vehicles.

NiCd batteries are known for their high energy density, which allows them to provide a significant amount of power in a relatively small and lightweight package. They also have a long cycle life, meaning they can be recharged and discharged many times without significant degradation in performance. Additionally, NiCd batteries have a relatively low self-discharge rate, which means they can retain their charge for extended periods when not in use.

However, NiCd batteries have some drawbacks. They are sensitive to overcharging, which can lead to a decrease in capacity and potentially cause the battery to overheat or even catch fire. They also contain cadmium, a toxic heavy metal, which poses environmental and health risks if not properly disposed of. Due to these concerns, NiCd batteries have largely been replaced by other types of rechargeable batteries, such as nickel-metal hydride (NiMH) and lithium-ion (Li-ion), which offer similar performance characteristics but with improved safety features and environmental benefits.