QUOTE (cREbralFIX @ Nov 5 2009, 12:38 PM)

The reason I'm asking is that with a power focus, the adept could assign adept powers to those points.
It'd be a "magic item" that bestows powers so long as it's activated. This would be implied with the loss of power caused by background count...the character has to choose which powers to lose.
"A power focus adds its Force
to all tests in which the magician’s Magic is included. "
That is all it does. The rest of the paragraph is clarification.
This does not give you additional power points or increase your actual magic rating - it gives you additional dice for tests that use the magic attribute. If I recall there are a few of the tests adepts use Magic for - a power focus gives extra dice to theses tests, nothing else is affected. I'm not quite so RAW a GM so I would allow an adept a power focus but as others have pointed out it is of limited utility