[Elecraft] External Battery for KX1

[Chuck Gehring]

I have a pair of Radio Shack NiCad RC model car batteries 7.2 vdc 2000 mAh.
I have but them in series and get 16vdc when fully charged.  In the past I
have put a 12 volt fan on the batteries until the charged was reduced to
13.5 vdc and then used them as an external power supply for my KX1.  However
there has to be a better way.  Can anyone offer a simple circuit that I
might put together that would provide a regulated 14vdc?

73 KI4DGH
Chuck G.
KX1 # 641
K2 # 4467