They will work in all models and speeds of Aluminum 15" Powerbook G4s (not Titanium models).

All are Apple-branded, as shown in the pictures.

I've used similar dead batteries before to get out the good battery cells, since usually only one of a few go bad.
Each has about 6-10 cells I seem to remember.
I use the good cells to power Laser Pointers (third picture), Magic Trackpads (fourth picture), Flashlights, and the older portable CD player.

They can be used as filler for filling the side bays of vintage laptops you may be selling (perhaps after removing the batteries).

Shipping is expensive, since I need send these USPS ground (not Priority) for safety.