A Small Inverter for Charging Cell Phone

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ama_trig

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Anyone have any idea/circuit to build inverter to convert 3.7 volt to 6 volt 40 mA. I want to charge mobile from 3.7 volt battery.
I've searched Internet, nothing found useful.
 

You can just short with 1 ohm resistor.
i.e. tie up GND.
+ve is connected to another end positive with series 1ohm resistor.
 

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