All of the aaa size batteries that we carry are shown below. Lithium-ion, lithium phosphate, nickel-cadmium, nickel-metal hydride, alkaline, lithium were once used. Make sure that the battery's voltage you select is suitable for your application. Lithium-ion batteries cannot replace a standard 1.2v or 1.5v battery. If you are not sure of the type of battery you need, please do not hesitate to contact us.