Remington Electric Shavers Parts
That battery pack cost $14.95. I realized afterwards that I could probably just have just ordered 3 regular solder tab AA NiCad batteries from any of a number of Internet sources for around $3.00 each and saved about $15. Live and learn.
The Norelco 6843XL came apart quite easily. I just removed two screws (although I did need to use a torx driver) and then popped its snap joints apart. The battery tabs of the single AA battery were soldered through the PC board, but with a solder sucker and some solder wick, they were easily removed and the battery was replaced.