Sony vtc/efest red,purple/aw battery, organic cotton, kayfun 3.1/lite+ v2, some kanthal 1a 28 awg wire, 15W kick module.
1. Lower the resistance of coil, higher the current will be. Too much current can damage and explode the battrey, so high drain imr batteries are a MUST! i=u/r , u = caa 4...