The Mobile Replacement Service is a service that delivers a car or truck battery to your home or work and installs it on-site. Why would you want to have a car battery delivered? It turns out that this service allows you to not have to drive to an auto parts store, drop it off at a mechanic, or to have the auto towed. You visit their website or call and they show up to replace your dead car battery. This allows you to work from home or play with the kids all while your vehicle is being taken care of.