Recently the charger for my BC235XLT went dead. The battery packs are
4.8 vDC, but the charger is only charging at a rate of about 4.1-4.3v.

I believe that it's the charger and not the batteries. I have owned
since new and I generally run the battery pack completely down before
using the next battery pack. There are only 4 components on the
circuit board which step down the voltage from 12.0 v. to the 4.8/5.0
charging voltage, so I believe that one of the 4 components have gone
bad (2 diodes and 2 resistors).

Has anyone else had this problem? Can someone point me to which
component is bad so that I don't have to de-solder all the components
off the board to figure out which is defective ?