On 10 Mar 2011 at 13:13, Brent Hilpert wrote:
  Yes, they (many Macs) did, they are half-AA size, but
are rather
 expensive and relatively difficult to obtain. 
Yup, some of the PowerMacs in partitular.  Why not just replace it
with a coin cell (CR2032s are almost a dime a dozen)?  Is the current
draw that great?
--Chuck