12v Marcum/Vex battery questions

[KrashR]

1. When unplugging my marcum from the battery so it doesn't get drained from the DCS is it OK to just disconnect the negative side? (It is easier to reach the negative side) Or will it still drain the battery somehow with the positive connected?

2. When charging a Marcum is it ok to leave the flasher itself hooked up to the battery while charging. (I know some small engines recommend disconnecting the engine before charging, I know this is not an engine, but still has electronics that can be affected just like an engine ignition)

3. After charging a Marcum with the DCS or a Vexilar battery with alligator clips, is it ok to just disconnect the charger from the 110 outlet, or should you disconnect both because leaving the connection to the charger can drain the battery still (I realize that the DCS will drain the battery slowly anyways, but will the charger on top of that drain it faster?)

Just want to make sure I don't ruin my Marcum, I always charged my Vexilar with the flasher hooked up and it started loosing color, but it just ended up being dirty brushes and not because of charging it that way.

4. Unrelated to batteries, but does everyones LX-5 go to the superfine line mode automatically when you go into zoom mode?

[CNY Tim]

1. I disconnect both tandem connectors after charging is complete. I don't leave anything hooked up. Conversely if I'm fishing back to back to back days I will leave it hooked up indefinitely. If your fishing once a week it is best to disconnect the tandem spades after charging is complete. I have 9 amp. that's 3 years old that still work's great and I charge it after every use and periodically monthly/bimonthly during the off season. The worse thing you can do is leave your MarCum all hooked up during the off season. "Z" fried his battery doing just that.

2. Yes

3. refer to answer #1

4. Yes