Give your 1989-1993 Dodge 5.9L Diesel a big boost in electrical power with new batteries. There are several signs to indicate the battery in your truck is failing and needs to be replaced. Sluggish engine cranking or headlights that are dim or flickering are telltale signs of trouble. 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 XDP today and get a new battery for your vehicle. XDP carries leading battery manufacturers such as Odyssey, and more! The average life expectancy of a battery is typically between three to six years. Even under the most ideal conditions, chemical reactions cause batteries to slowly break down.