Let me say, a battery tender is a brand, not a type. It is not a battery charger, but a battery maintainer, and in my estimation, the best on the market. You can get one at Wal Mart, very reaonalbly priced. Years ago, I got one when I bought a Harley, and at the time I was replacing batteries bout every three years. (riding about 12 to 14,000 miles a year). So I had this tender, and read an article that it wouldn't hurt anything If I hooked it up when I wasn't riding, so that is what I did. Over time I discovered that using the Tender, I was getting close to 7 years battery life from the same batteries that I was replacing every three years. Today, I have Battery Tenders on all of my vehicles, ;garden tractor, and boat. If you want the technical info on how they work and what they do, go to Battery Tender's web site and read about them. Another thing, they have a very good warrantee, and the company does stand behind it. I had a bigger one that after 12 years quite working, and called them about it. (they are hear in Florida and within driving distance of me) They sad I could mail it to them and they would look at it, or, I could bring it in and they would test it for me. In all fairness, I could not remember how long I had it. When I took it in, a technician came and got it, 10 minutes later he came back, said it was shot, and that it was 12 years old. That model was only warranteed for 10 years, and no longer covered, but, they sold me a new one for 1/2 price. So, that;s my story and I'm sticking to it. I know that many people will tell you that you don't need to use it all of the time, I told you my results. It's up to you. But with the mentioned pigtail that comes with it, it's just a matter of plugging it in and turning it on. Good luck with what you do.
David
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