Upgrade the electrical system in your 2003-2007 Ford 6.0L Powerstroke with new batteries. Your truck's battery can fail and need to be replaced for a variety of reasons. The indications of a weak battery will often include slow engine cranking and dim or flickering headlights. A battery's average lifespan is normally between three and six years. Chemical reactions cause batteries to steadily degrade even under perfect conditions. Dual batteries were offered on some heavy-duty diesel trucks. If your truck has two batteries, it's always a good idea to replace them both at the same time. Shop the wide selection of batteries for your vehicle at XDP. XDP carries industry leading manufacturers such as Odyssey Battery, and more!