New Mercury 250 ProXS ( serial (2b737965) . Now that my new engine is installed and no more oil reservoir I was going to add a dedicated battery for my electronics in is place. I have a 3 bank charger setup and was going to hook up the the two trolling batteries and the dedicated electronics battery for charging and let the motor charge the started battery only. Was wondering if the motor has any draw on the battery while sitting in storage between fishing trips (two weeks or so) or should I get a four bank charger ? Does disconnecting the battery from the motor reset any computers, settings or controls ? Thanks