[X4U] Power adaptor for Titanium Powerbook

[Michel Treisman]

I am looking for an extra power adaptor for my 17" 1GHz TiBook, and  
there seem to be two worth considering.
There is the Apple power adaptor M8943B,  and there is a Macally  
power adaptor, PS-AC4.
 From what I can see, the Macally is half the price of the Apple  
power adaptor, but it gives 48watts, and the Apple power supply  
produces 61 watts - I think.

Does the difference matter? Does the Macally give enough power to run  
the TiBook without the battery?
  Has anyone had experience of the Macally adaptor and can tell me  
which will be better?

Mike