BAE Systems already provides the hybrid electric drive system for DaimlerChrysler's Orion VII buses that are operating in transit fleets around the world. The company has just announced their next-generation system that will be available in 2008 switching to lithium ion batteries. The lithium batteries are using NanoPhosphate electrodes developed by A123Systems. The BAE battery pack is designed to monitor individual cell performance and route around cells that have failed for any reason so that the whole pack can keep operatiing.
[Source: BAE Systems]