Heading out soon to pickup 3 float chargers for the bat's. Wondering will all three chargers works on a power strip placed in my boat, any certain size I need or strenght, and will any outdoor extention cord work? I know when I use the power saw, sometimes the cord gets fairley warm. I'm assuming the watts used at a cont. rate are vary minimal and my electric bill should not change much. Thanks as usual for everyone's input.

Those chargers don't draw much power - any extension cord will do fine.  They are intended primarily for maintaining a charge on batteries.  Don't expect them to re-charge a depleted battery unless you don't mind waiting a week.

Thanks Ann-Marie!