Does anyone know how to power an H9 with a T-Rex Fuel Tank Chameleon? The Chameleon provides 300ma 2.1mm center pin negative power, and the H9 requires 500ma, 2.5 mm center pin positive power. Does anyone know a specific cable/adapter setup that doubles the current from the Chameleon and converts + to – and 2.5mm to 2.1mm