Hello Vince, Some folks on this list have told you that the charger for the Optacon Two is the same as the one for the TSI Braille Navigator. I had one of those puppies at one point, the charger went bad and Richard Oehm built me one from scratch. As I remember it delivered 18 volts which is an odd voltage. Hope this helps. Eric Clegg Braille Specialist To unsubscribe at any time, just send a message to: optacon-l-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the quotes) in the message subject. Tell your friends about the list. They can subscribe by sending a message to: optacon-l-request@xxxxxxxxxxxxx with the word "subscribe" (without the quotes) in the message subject.