Visitors are seen at the booth of Lishen Battery at a new energy expo in Beijing in this file photo. Tesla Inc. has signed a preliminary agreement with Tianjin Lishen to supply batteries for its new Shanghai car factory, as it aims to cut its reliance on Japan’s Panasonic, sources said. The companies had yet to reach a decision on how large an order the U.S. electric car company would place, and Lishen was still working out what battery cell size Tesla would require.SD-Agencies