trolling motor batteries

Question
Hi,

 I have owned bass boats for about 15 years.  When I got my first boat someone had told me I should disconnect the trolling motor battery when I charge it.  Is that necessary?

Answer
I would it is a safe proceedure however:

It's not really  necessary to remove the batteries from the boat to charge them but it is a wise idea to at least remove the cables/wires going to the ground post of the battery being charged.

Removing all cables/wires from positive and negative posts of the battery would be best.

It helps to tape all the positive(+) cables with red electrical tape as a bundle a little ways back from battery, and do the same with black electrical tape on the negative(-) wires.

If you don't have red and black electrical tape then colored wire tys work pretty well.

Sometimes you(or someone else) might mix em up if they're off a while and cause a short and damage electrical components on motor or boat.

ALWAYS be sure key swith is off (better to remove key) anytime you connect, disconnect, or charge the cranking battery