Tesla Roadster battery replacement cuts 400 pounds, half the space

2011 Tesla Roadster Sport. Photo by Joe Nuxoll.As the second-generation Tesla Roadster remains on the drawing board, a Texas-based company has sketched out a new life for original Roadsters, while improving their handling. Re/Cell, which specializes in remanufacturing EV battery packs, recently unveiled a replacement Roadster battery pack that's 400 pounds lighter than the original and takes...