I have two of them. I keep one on the boat battery and one on the golf cart battery. It's very worth $20 to have your batteries maintained. I have two of these: http://www.sears.com/shc/s/p_10153_12605_02871219000P?prdNo=7&blockNo=7&blockType=L7
Thanks, I think I might pick one of those up for sure. That is a great price too. I have two batteries so I might get two and then go from there. I will just run a extension line to the dock and keep em' hooked up
I keep my extension cord in the battery compartment with the charger and the battery and then just walk it to the front after I pull in my slip. Takes all of 10 seconds.