"jtaylor" wrote in message
et.ca...
When I was little(r), almost all small portable radios used 9-volt
batteries. There were some, of course, that used AA's (or even 1 AA; I
had
an am portable with 1 AA cell that we snuck into school when
something-or-other REALLY important to schoolboys was going on), but now I
don't have & don't know of any radio that uses 9V batteries.

Why were they needed in the first place? The 9-volt package has a lot
more
package and a lot less mWatthrs in it. Was it because of the voltage -
did
the existing solid-state tech not work so well at 3V?


When I was little(R), all of the portable radios (tubes) used 67-1/2V B
batteries plus a couple of D's.

HankG