I have 4 chargers with round plug.
- 3 of them are 24v 1.875A ie. 45W
- 2 of the 45W chargers have
white round plug, one has a
silver one (?)
- one is 24.5V 2.65A ie. 65W. This is labeled as for the PB G4 Titanium.
I also have 2x PB G4 12" and a iBook G4 14". One 12" and the iBook was purchased new so I have their original chargers. The second 12" might have come with non original charger, maybe the one with silver plug as it has a year marking of 2001 which does not match any of my PowerBooks?
So, logically it is likely that 2 of those 45W chargers are for the PB 12" G4. So, you should be ok on that front.
EDIT: confirmed, this is what is written behind the 12":
BUT! it seems like most places are selling 65W chargers for the 15" and 17" PB G4's. If I was you I would get one to make sure the machine gets enough juice as you do not have a battery in it. This is something that might cause some of your issues?? EDIT: what does it say behind the PB 17"?