PowerBook: Using External Device to Discharge NiCad Battery

When using an external discharge device to discharge the NiCad battery in a PowerBook, is there any adverse effect on the hardware or internal lithium battery?
There should be no issues using an external discharge device to discharge and then recharge a the NiCad battery in a PowerBook 140, 145, 160, 170, or 180.

Note: This should NOT be done, however, with a PowerBook 100 or PowerBook Duo, which do not have a NiCad battery.
Published Date: Feb 18, 2012