Charles Battery Selector Switches These switches allow boaters to choose between any combination of two batteries. The switch with alternator disconnect is for use when the batteries are shut off but the engine is still running. The alternator disconnect eliminates possible damage to the alternator, a valuable assurance that the alternator is protected. All Charles Battery Selector Switches are ignition protected, Marine UL Listed and meet US Coast Guard and ABYC standards. All switches are manufactured with heavy-duty contacts for optimal, reliable performance. 2-year warranty. -------------------------------------------------------------------------------- Product No. Description Continuous Amps Intermittent Amps Dimensions Weight 93-BS002AD-A Four position (2 battery) switch with Alternator Disconnect 230 345 5.5” dia., 2.6” deep 2 lbs. 93-BS002-A Four position (2 battery) switch without Alternator Disconnect 230 345 5.5” dia., 2.6” deep 2 lbs. 93-BS001-A On/Off Switch 230 345 5.5” dia., 2.6” deep 2 lbs.