This 12-volt DC power cord is designed to allow you to connect your Puritan Bennett 420 series CPAP or BiPAP machine directly to a 12-volt battery power source, such as marine battery. Great for those who travel by vehicle often such as campers or long distance truck drivers. Please note: This product will NOT work with the PB425 or PB425ST BiPAP. This power cord is for use only with Puritan Bennett Goodknight 420 series machines that are going to be plugged directly 12-volt, 100AH, deep cycle marine battery (separate 12-volt battery required). If you would like to plug your Puritan Bennett machine into a cigarette lighter power source, please see our Puritan Bennett 12-Volt DC Power Cord, Cigarette Lighter Connection.
