D Professional alkaline batteries by Duracell. The PROCELL line of professional batteries provides Americas favorite coppertop battery in bulk at drastically reduced prices. Duracell quality makes it the most popular battery on the market and PROCELL offers the opportunity to save money and the environment by dispensing with wasteful packaging. Duracell Procell is the preferred choice of professional battery users. The Power Protechnology in Procell alkaline batteries delivers more power and longer life, especially in high-drain applications. With a 7-year freshness guarantee, industrial users get premium battery performance without the premium price.