Interchange power adapters ?

[ladrumors]

I currently have a 17" G4 1.67 powerbook with a power adapter that is on its last legs. I have a new Macbook Pro on order (at long last!), but I want to keep using the old laptop on occasion. The new laptop will come with an 85W adapter but the old one requires a 65W. Is it safe to use the new 85W adapter with the old laptop?

 

[creator2456]

If you can find a way to make the plugs work.