Launched at Jeep Beach 2013 in Daytona, Florida, the dual-battery system is now offered for 2007-to-2013 Jeep JKs (including those with HEMI engine swaps). The new heavy-duty dual-battery box ...

There are several ways to create a functional dual-battery system. One is a simple setup with a boat-style switch, a nautical battery selector that lets you choose either battery—or both—for ...

A battery box, on the other hand, is useful for anybody building a car. A basic and straightforward design made with simple shapes and tools, this project is definitely achievable for a first-timer.

Building a simple battery jumper box is a lot easier then may you think when you have help from this month's Junkyard Builder!