Re: Do you have a Battery Switch with just 1 Battery?
It doesn't matter if you have a switch, disconnect the cable, or leave it connected. If you have a habit of leaving stuff turned on then a battery switch or disconnecting the cable is probably in order. If the boat sits unused for weeks at a time and AC power is available, install an on-board smart charger. They can remain plugged in indefiinitely and will keep the battery in top condition. Otherwise a switch is certainly a better alternative than disconnecting the cable.