As this is to do with drills, Ill post my question here.

Im going to use two 14.4v drills for drive in my featherweight, and got with it two 14.4v Ni-Cd batteries of course...
What I want to know what difference is there if I run each drill on 14.4v (one set for each drill), and running both drills on a combined 28.8v?

Thanks in advance...