INDIANAPOLIS-Battery developer EnerDel Inc. has applied for $480 million in low-interest federal loans through a new program intended to help U.S. automakers and their suppliers build more fuel-efficient cars. EnerDel would use the money to double the manufacturing capacity at its plants in Indianapolis and Noblesville, IN, lifting production of lithium-ion battery packs for hybrid vehicles to 600,000 by 2011. MORE