How to renew your car battery.

I bought a deep cycle marine battery 3 years ago and now it's dead. I also had purchased a 12 volt seal battery for my solar panel to charge. It almost immediately stopped working after about a month. So I started to look and see if you could refurbish an old battery. I knew you could I just wasn't sure how. This video that I ran across blew me away. Do not throw away your old car batteries until you watch this video.