>I'll try to find these 1/2 AA batteries. Or do what you suggested. But, 
>with two AAA I only get 3V, not 3.6V of this 1/2 AA. Is there a problem 
>with this?

3 volts may get you close enough to work

>And the two AAA batteries must be rechargeable, right?

No, the Mac does not recharge its PRAM batteries, so standard batteries 
are what you want (and they should last long enough to not make it worth 
the cost of rechargables... you should get at least a few years from the 
batteries)

-chris
<http://www.mythtech.net>