[fintstone]

I use this CTEK. I have 6 of these in use (including one on my riding mower) and the two accessories for each below (it comes with other accessories). I have used these for many years and have never had one fail (nor had a battery go bad) since I have been using them. They are a little pricey. At first, I just used one but bought additional connectors for each car and rotated them, but over time, I added units when on sale or when someone gave me an Amazon Gift card or there was a really good deal on EBay. There are quite a few other accessories you can buy if wanted. They are the only ones I have tried.