Mark can probably help me out with this, but I am sure others can too. My motor charges the battery while running, and I have pull start, so battery charge is never really a big concern, but I am switching to a larger trolling motor, so I want to add another battery for it, and I will probably run everything except lights from it as well. (bilge pumps. aireator pumps, depth finder, etc.) So here is my question. Can I use the motor to charge BOTH batteries, and how exactly do I hook the second battery up to recieve the charge from the motor? Can I use a switch so it is not charging 100% of the time? The reason I do not want it charging 100% of the time is due to the interference with the fish finder. Am I barking up the wrong tree here?