Well, this has proably been posted to death, did a search and all it would show me is "Batteries"!
I have the 1-2-both switch already, but with my HDS8, HDS7, Sructure Scan, Radar, S.M. 2150 AIS/DCS VHS and a MPS/C.D./Radio, I'm thinking it's going to draw a lot of AMPS!
I want to isolate the...