Upgrade the electrical system in your 2003-2004 Dodge 5.9L Diesel with new batteries. Shop the wide selection of batteries for your vehicle at XDP. XDP carries industry leading manufacturers such as Odyssey Battery, and more! 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. Dual batteries were available on many diesel trucks. If your truck has two batteries, both should be replaced at the same time. The average life expectancy of a battery is typically between three to six years, but there are several factors that can have an impact on that estimate.