How to recondition old batteries or dead batteries. as more people are getting into the wave of renewable energy like wind and solar, the need for storing energy in batteries is still relevant today more than ever before.. The ez battery reconditioning™ course is the easy to follow, step-by-step system to recondition all kinds of old batteries with just simple supplies you probably already have in your home. the course is made up of step-by-step guides that show you how to recondition each type of battery.. How to recondition batteries ? is it possible ? most people believe that an old battery must be thrown away and replaced with a new one. while this is the only solution for those people, there is another way you can save money and get a 100% functional battery..