I waited till my old battery started to fail so I could install a second battery.. I have heard pros and cons about using electronic dual battery kits that are very expensive and I have seen a lot of vehicles with dual batteries hooked up in a parallel configuration with out those kits. There are a lot of factory vehicles that do not use the kit or any isolation kits. I have done this with several chevys in the past that went well over 250,000 miles with no problems and I installed this one 3 weeks ago. Set up is very easy on the front right side looking under the hood there is a battery tray the factory installed but never used. Parts list Battery hold down and bolt. You can get them from an auto parts store or the dealership it is the same part used for your existing battery Two new batteries. It is best if you replace both batteries at the same time. 36 inch negative battery cable. 65 foot positive cable. Installation is pretty easy replace the old battery but do not attach the cables yet. Install the second battery in the front battery tray and bolt it in. If you have any large draw items like a winch or big stereo system you should attach it to the second battery. Attach the 6 foot positive cable to the original battery block be sure to attach it to the battery side of the fuse block. Attach the other end of the cable to your second battery you can run it along the fire wall or across the top of the motor. Attach the negative cable to an empty bolt hole on the cylinder head Both positive cables should be connected now if you didn't already so, it is time to attach both negative battery cables to their respective battery posts. Re check all connections to be sure they are tight and you are ready to go. In the future I may install a cut out switch that will cut the power from the main battery when I run my winch or decide to run a stereo and lights when camping so the other battery will be unaffected.