Upgrade the electrical system in your 2014-2018 Jeep Grand Cherokee 3.0L EcoDiesel with new batteries. 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. 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. Shop the wide selection of batteries for your vehicle at XDP. XDP carries industry leading manufacturers such as Odyssey Battery, and more! 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.