-> Take for example that truck that had the group 31 in it.  Those were available
-> in three different ratings,  one was about 600CCA,  one about 700,  and one
-> 900.  The one in the middle,  though,  was rated at 180 minutes of reserve
-> power,  while the other two were only rated at 120 minutes.  The difference is
-> thicker plates.

 The Reserve power in important in soem applications or those that like
ot park and listen to the radio on some Lovers Lane. 
For those in Snow Country the CCA is Far more important.
--- Platinum Xpress/Win/WINServer v3.0pr5