Upgrade the starting power in your 2008-2010 Ford 6.4L Powerstroke with a new battery. Many heavy-duty diesel trucks came equipped with dual batteries. If your truck has two batteries, it is recommended that both batteries are replaced at the same time. 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. Shop the wide selection of batteries for your vehicle at XDP. XDP carries industry leading manufacturers such as Odyssey Battery, and more! A battery's average lifespan is normally between three and six years. Chemical reactions cause batteries to steadily degrade even under perfect conditions.