The CXS has a different charger and battery format than the C/T-series drills. So, you will need to use the CXS charger.
Edit: I should mention that the CXS comes with a charger and can't be purchased without one.
You can use the Centrotec and keyless chucks from the C-drill, but not the eccentric or right angle. This really doesn't get you much over the CXS as it's sold, except slightly more capacity in the keyless chuck (1/2" versus the 5/16" with the CXS).
Shane