Manganese dioxide has long been used as a depolarizer in alkaline batteries, but this is not the manganese battery market that is now the most interesting. Attention is being drawn to lithium-ion battery chemistries that require manganese — such as lithium-manganese oxide batteries and lithium-nickel-manganese-cobalt oxide batteries. In these batteries, electrolytic manganese dioxide is used as a cathode material. Investors who believe battery sector demand for manganese will increase are optimistic that lithium-ion batteries that require manganese will become more common in the future.