SHANGHAI, July 25 (SMM) - The demand for replacement of lead-acid batteries continued to improve, hence the battery inventories of traders decreased and the orders increased accordingly. SHFE lead prices rebounded to 15,000 yuan/mt after falling. Meanwhile, the prices of various auxiliary materials, such as plastics, sulphuric acid, tin and other materials fell. As a result, battery companies were not in a hurry to raise the prices, and some battery brands even extended the sales promotion. For example, the wholesale price of the main model 48v20Ah stood at 380-400 yuan/set. In terms of battery companies, major companies generally stockpiled on dips a week ago when SHFE lead prices were low. Therefore, they were less willing to purchase after the lead prices rose to 15,000 yuan/mt last week and mainly digested their inventories.