Actually, that's probably correct, as I had previously swapped the active TFT screen from a 1400c onto the 1400cs "body", which means that it was the 1400c body (the donor of the top case in this recent transplant operation) which indeed has two PRAM batteries. I wonder why the change from one to two?
ps now is probably timely to remind people to be careful soldering around lithium batteries. If they overheat, they can explode. Take care, kids.