I don't think it works like that. Use a typical trace width calculator e.g.: http://www.circuitcalculator.com/wordpress/2006/01/31/pcb-trace-width-calculator/

I don't think it works like that. Use a typical trace width calculator e.g.: http://www.circuitcalculator.com/wordpress/2006/01/31/pcb-trace-width-calculator/ http://www.circuitcalculator.com/wordpress/2006/01/31/pcb-tr... And you'll find that a 1.5mm wide, 1mm thick, trace can carry 18Amps. That's obviously pretty large for a PCB trace, but not untypical for a microUSB-like connector. But... this is all assuming we're using caps at ~5v. Seems like you might want to use significantly higher voltages and buck converters to power the phone.