Chinese dry cell batteries are giving the home grown brands a run for their money. In spite of stiff anti-dumping duties imposed by India, the Chinese dry cell batteries continue to enter through the Kolkata and Mumbai ports. Ballpark estimates show that Chinese brands like Durabat, Sonic, Kingsun, Golden Power, Anchor and Rotosonic have cornered a significant market share of anywhere between 10-15 per cent of the AA segment. The total organised market size of the carbon zinc AA segment, commonly called the "pencil battery", is around 700 million pieces annually, which in turn a third of the total carbon zinc battery market of various sizes.