nickel-cadmium cell

electronics

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July 1, 2026

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A nickel-cadmium cell, often called a NiCad, is a type of rechargeable storage battery. It features a nickel cathode and a cadmium anode. These batteries are commonly used in portable electronics and are known for their ability to be rapidly recharged hundreds of times and their tolerance for abuse like overcharging or overdischarging.12

However, NiCad batteries can develop a "memory effect" if not fully discharged before recharging, which reduces their effective capacity. Compared to other battery types, they are heavier and have a lower energy density. Larger NiCad batteries are used in applications requiring high currents and reliability, such as aircraft engine starting and emergency power systems.2

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Nickel (hydroxide)–cadmium systems are the most common small rechargeable battery type for portable appliances. The sealed cells are equipped with “jelly roll” electrodes, which allow high current to be delivered in an efficient way. These batteries are capable of delivering exceptionally high currents, can be…
Read More