Perko 9611 Series battery On-Off switches use the same traditional Perko footprint as the 9601 Series. This makes for easy installation. These switches can be mounted in numerous locations. And as ignition protected switches, they can be installed in the engine rooms of gasoline powered boats. Versions of the 9611 Series switches offer additional features such as alternator disconnect and key lock security. Four removable skirt panels allow for easy cable connection from different directions. High conductivity studs are long enough to handle more than 1 cable and strong enough for torque needed for secure connections. Battery disconnect switches help manage the overall use of electrical power onboard. They are used to connect or disconnect electrical devices from the electrical system. They help to prevent battery drain during periods of inactivity. They allow for a quick and easy way to shut down the entire electrical system in an emergency. An optional key lock helps to prevent unauthorized use of the vessel. Perko battery switches are designed for surface mounting. Compact disconnect switches have bright red polycarbonate reinforced housings for safety with large easy-to-turn black knobs. The housing of the heavy duty switches are red fiber-reinforced polycarbonate.