On Tuesday, January 15, 2019 at 2:26:15 PM UTC-6, David Snowdon wrote:   
   > How about the 18650 in series with a Si diode, such as   
   > a 1N4001 ?  The 0.6V drop should reduce the voltage   
   > sufficient to be considered safe.   
   >   
   > David   
   >   
   > ---   
   > Andy wrote:   
   > > I have a door bell that uses 2 aa batteries.   
   > >   
   > > Would a 18650 work in such an application.   
   > >   
   > > I don't know if 4.1 volts would be too high.   
   > >   
   > > Thanks,   
   > >          Andy   
   >   
   > ---   
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   It only dropped the voltage by .2 volts.   
      
   Andy   
      
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