Nickel battery may refer to: Nickel–cadmium battery, a type of rechargeable battery using nickel oxide hydroxide and metallic cadmium as electrodes Nickel–iron battery, a type of rechargeable battery using nickel(III) oxide-hydroxide positive plates and iron negative plates, with an electrolyte of potassium hydroxide Nickel–metal hydride battery, a type of rechargeable battery with the negative electrodes use a hydrogen-absorbing alloy instead of cadmium Lithium coin cell batteries, sometimes called nickel batteries despite not containing nickel