XPost: sci.electronics.design, uk.d-i-y, alt.home.repair   
   From: briang1@blueyonder.co.uk   
      
   Its called a lossless charger. I encountered something like it in an old   
   pifco charging circuit in a torch. From what I could see one  rectifier one   
   large capacitor and a small bleed resistor across the mains pins was all   
   supposed to charge two flat Ni-cads, and it was fine until the capacitor got   
   leaky, and the room filled with nasty smelling smoke.   
      
   I'm just guessing here, since I cannot see your circuit, but it used to be a   
   very common practice for small rechargeable devices.   
   Brian   
      
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   briang1@blueyonder.co.uk   
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   > https://imgur.com/a/b8l5qKQ   
   >   
   > Look at the circuit diagram.  The positive of the battery is only   
   > connected through a capacitor.  How can a capacitor possibly pass DC   
   > current to allow the battery to charge?   
      
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