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Why 9-volt batteries?
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? |
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