MOTOPOWER 12V 800mA Automatic Battery Charger, Maintainer, Trickle Charger and Battery Desulfator - Junior Plus

If you have had 12V batteries fail because they have been discharged from not being used, a float charger is what you need to keep the batteries working for years to come. I know the equipment and cars that are not in use in my garages, that were put away last fall will start on the first try, because I use a Motopower float charger on each one. My 6 batteries will be fully charged, ready to start the cars and equipment, they have been kept fresh and ready to work, by the Motopower float chargers. A flashing red light will tell you when the Motopower charger is charging, when the light turns green the battery will be fully charged, ready to put into use.

I found out this doesn't help with a completely dead battery and that my current battery charger wasn't working. I re-read the instructions and it says this with the color/flashes of the light. Once I got a little charge in my battery, the maintainer finished charging the battery. It doesn't charge it immediately, but low and slow over a couple of days. It's a good item to keep your battery charged if you don't drive a vehicle very often. It's a good price too. I also like that it came with the clamps and ring connectors. It will work on both of my vehicles.