Powerbook G4 Magsafe adapter.
The older power supply socket and connector have always been fragile and problematic for quite some years and I'm surprised, considering the amount of stuff available on the internet, that either Apple or some clever 3rd party person hasn't come up with an add-on solution similar to the Magsafe concept. Especially considering the number of Power PC iBooks and Powerbooks still in use today.
I can quite visualize a small adapter attaching to the male power supply pin that will create a magnetized flat face end and the laptop would have a small semi-permanent plug inserted in the female jack resulting in reasonably flush fitting magnetized flat face end. This protrusion from the laptop casing would be only a few mms and I believe the final result would be quite workable and not too expensive to produce.
Regards,
Graeme