The Burman family, promoters of packaged consumer goods maker Dabur India, has picked up 8.8% stake in battery maker Eveready Industries, increasing its existing stake in the Kolkata-based company to 20%. This follows a block deal for 64 lakh shares in the country’s largest dry cell batter maker. The share purchase is a personal investment by the Burman family, an official directly aware of the developments said.