Can You Use Deep Cycle Battery For Starting. Am I going to hurt a battery by running the deep cycle with the cranking battery jumper together its still 12 volt. Can I use a deep cycle battery in a car.

Let the battery cool down after continuous use and let them rest. YES YES YES but if your running a marine battery its not designed for cars as an always use battery. The deep cycle batteries are designed to provide steady power over a long period of time making it an ideal option for marine vehicles and thats why sometimes called a marine battery.
You can get this from a battery company like interstate or at a place like NAPA.
The amperage required to start a modern diesel can be surprisingly low. The battery is then recharged by the alternator. If you use a deep cycle battery as a starter battery you could be harming your battery. Why You Cant Use the same Battery for Cranking Trolling.
