What is the relationship between 'Duracell' and 'battery' in the context of the input sentence.
Options: distributed by, creator, operator, product/material produced

-- U.S. company Berkshire Hathaway (Sao Paolo: BERK34.SA - news ) to acquire U.S. personal care and cosmetics company Procter & Gamble's Duracell battery unit (notified June 23/deadline July 29)
product/material produced