Does your G4 Powerbook refuse to charge ?

Apple published an interesting info on their site (http://docs.info.apple.com/article.html?artnum=32155)
It explains why some times a G4 PowerBook (867 MHz & 1GHz) will not charge.
The first suggested solution is to unplug the small adapter from the electric supply box and then to plug it again.
More important, you'll learn that the 65 W adapter might deactivate by itself if the electric tension should vary too much. That is the case if too many electric devices are linked to the same power strip, or if this strip is in a bad shape, which is rare in France.
On the most desperate cases, an uninterruptible power supply (UPS) device that corrects and filters the stream will address the problem.