DieHard Battery Charger/Maintainer —
I purchased this to maintain my motorcycle battery, however it works well for my small car (430 cca) battery too. On both batteries it slowly tapers off the charge (both charged and charging lights on as described in the instructions) as the battery nears full charge; 14.5v for lead acid batteries. If you want to know the health of your battery, check the voltage 24 hours after charging. It should be at least 12.5v at around 60 degrees. If it is less, you battery is starting to show some effects of age. I haven't had to bring a car battery back from the dead (<12v for lead acid), however this is not the correct charger for that task due to its low amp rating. That's why it is called a maintainer. Overall, I'm very happy with it.