Manganese Bronze Holdings LTI Limited as its only operating division. In October 2012, MBH entered administration, having not made a profit since 2007. The Chinese automotive manufacturer Geely, which already owned 20% of the shares in LTI Limited, the company's only business, agreed to purchase LTI's principal assets and trade from the administrator to save the business and continue the production of taxis in Coventry. The new holding company was named The London Taxi Corporation, and traded as "The London Taxi Company" (as LTI had done): this successor company was renamed to London EV Company in 2017. Manganese originally made ship propellers. In
Manganese dioxide silver or barium. is often called Hollandite, after a closely related mineral. Naturally occurring manganese dioxide contains impurities and a considerable amount of manganese(III) oxide. Only a limited number of deposits contain the γ modification in purity sufficient for the battery industry. Production of batteries and ferrite (two of the primary uses of manganese dioxide) requires high purity manganese dioxide. Batteries require "electrolytic manganese dioxide" while ferrites require "chemical manganese dioxide". One method starts with natural manganese dioxide and converts it using dinitrogen tetroxide and water to a manganese(II) nitrate solution. Evaporation of the water, leaves the crystalline nitrate salt.