... 19V 4.74A 7.4*5.0 dc connector universal universal laptop ac adapter OEM& ODM are welcomed Specification: 90W 19V 4.74A 7.4*5.0 dc connector ... %100mV15V2.5A37.5W82%120mV19V4.74A90W85%180mV24V2A48W87%240mV Use IC solutions, very low standby power consumption, heat a small, high stability, ... products full inspection:to make sure no cold solder ,lack of components, no tin dross, no short-circuit, no open ...