One problem related to battery has been reported for the 2005 Ford F-550. The most recently reported issues are listed below.
We started experiencing problems with the wheels, brakes, electrical, engine and vehicle stalling when being driven in 2005-2008. Continued to have problems in 2009 with the transmission, coolant, lack of power, batteries and vehicle stalling while being driven. The Ford dealer diagnosed as a turbo problem, head gasket, vc gasket, egr, oil cooler, no oil pressure. A new turbo was installed. In December 2009 the truck stalled while driving, due to a failed turbo hose. Jan. 2010, the truck stalled again. The cam sensor, injector and ficm were replaced. In April and may 2010, the truck stalled again and all the injectors were replaced. In March 2011, the truck stalled again and the cam sensor and injectors were replaced again. April 2011, the injector needed to be replaced again. Updated 10/20/11.