I used to have the ni-cd pack for the New F-1 (AKA F-1N, as opposed to the earlier F-1n), but when it wasn't holding a charge anymore, I decided to sell it for parts and replace it with the AA power pack that takes 12 cells. I bought it over the counter in the early 1990s from none other than the infamous Cambridge Camera, which had a pile of them new in the box on a shelf somewhere in the back. No idea why the 12-cell power pack wouldn't have been a popular item...
Canon New F-1 with motor drive, AA power pack, aluminum body cap, no lens, minimalist strap, QR plate--1812g
Canon EOS-1n RS including 8-cell AA pack, plastic body cap, no lens, QR plate--1528g