''Lithium nickel cobalt aluminum oxide ('''LiNiCoAlO2''' or '''NCA''') and lithium titanate ('''Li4Ti5O12''' or '''LTO''') are specialty designs aimed at particular niche roles.''
''The new '''lithium sulphur''' batteries promise the highest performance to weight ratio.''
http://batteryuniversity.com/learn/article/types_of_lithium_ion