Posts: 130
Threads: 36
Joined: Jan 1970
I would advise against using the 67 on the adapter with no battery pack. The card reader control board is hard wired directly to the battery circuit (it doesn't get switched over to the adapter's 5vdc power supply by the wafer switch when the adapter is pluged in like the rest of the calculator does.) The no load voltage on the constant current battery charging circuit out of the adapter is around 14vdc (if memory serves), and with no battery there would indeed be no load. It may be OK if you don't use the card reader, but IMHO, I wouldn't risk it.
Best regards, Hal