Duracell are the world’s best known manufacturer of Alkaline batteries in standard sizes like AAA, AA, C, D and 9V PP3 sizes. They also offer a wide range of additional sizes and for some time have also produced lithium cells. In recent years, Duracell’s innovations expanded to include new battery designs with their prismatic batteries, which are prismatic in shape rather than cylindrical. Prismatic cells are available in both alkaline and lithium designs.