According to a Reuters report, General Motors has chosen Troy, MI-based Compact Power Inc. as the supplier of battery packs for the initial production run of Chevrolet Volts. Compact Power is a subsidiary of South Korean conglomerate LG Chem and was one of two groups that were awarded development contracts for the Volt in June 2007. The other contract went to a partnership of Continental and A123 Systems. CPI has been rumored to have won the production contract for some time and GM acknowledged in late summer that a decision had been made. An official announcement is not expected until some time in November, perhaps at the Los Angeles Auto Show. While a technical decision has been made, GM and CPI still have to settle the commercial details including how the carmaker and supplier will split warranty costs. CPI has been considered to be in the lead since very early on when they delivered their first prototype battery packs almost two months before Continental/A123. When we spoke to Bob Lutz back in June he said although one supplier was in the lead, both companies were continuing to work on packs in the hope of accelerating the learning process.