[ScowardNJ]

Thanks for the responses guys. I'm not looking for a tender for when the boat is in the water. I have that covered. I'm looking for something to maintain my marine batteries indoors over the winter and to maintain a boat battery while on a trailer in the driveway. I also have some smaller 12v 7amp batteries i use kayak fishing and a lawn tractor. The Battery Maintainer is probably the way to go. I think i had one a few years back, are they the ones with that signature hum?