Concorde Corporation manufactures by hand some of the highest-quality batteries in the world. The build to Mil-Spec Lifeline and the SunXtender range of batteries for RV/Motorhome and Renewable batteries. Most customers will tell you they are still performing well 8 years after installation so you can rest assured that you've made a good investment and that you will get a strong return on your hard-earned money. This range is indent order mostly to ensure the batteries are fresh for your installation.