German sports car manufacturer Porsche intends to invest in the financially troubled battery firm Varta. The Stuttgart-based carmaker plans to acquire a majority stake in Varta’s car battery subsidiary V4Drive Battery, Porsche AG announced from its headquarters in Stuttgart on Saturday. Porsche also expressed its willingness to participate “with further partners” in the financial reorganization of Varta AG, it said. Porsche’s investment would amount to €30 million ($33.1 million). “In this context, it is planned that Porsche will acquire a majority stake in V4Drive Battery GmbH through a capit…