Garmin StreetPilot C330 GPS Receiver "car battery fish" Questions

...battery can also interfere with voice so ensure its fully charged leaving it in a hot car can also damage chips (we uasually ask if they had fish with it (chips) as heat in cars melts many items ...

...CAR RADIO WITH CD PLAYER. I WANT TO HOOK IT UP IN AN ICE FISHING SHANTY. I WILL POWER IT WITH A PORTABLE BATTERY. THERE ARE 3 WIRES I NEED TO KNOW WHERE THEY GO . BLACK(SAYS GROUND) RED (SAYS POWER) ...