I inherited this charger thing from my grandfather. Google searches turn up nothing. It doesn't look like it was ever used, and I don't know how to use it. All I found was that "Boat US" was a magazine so I guess he ordered it from a magazine. He had a sailboat at one time.
Can anyone explain to me what this is and how to use it? What does one of these cost?
Can anyone explain to me what this is and how to use it? What does one of these cost?