For Asus AD2131M20 Replacement AC Power Adapter Charger 19V 1.75A - 2.37A 45W
Specifiction: Input: AC 100-240V-1.7A 50-60Hz; Output: DC 19V 1.75A-2.37A 33W-45W; Connector: Φ4.0 Φ1.35mm. ASUS A / B Series ASUS C / D Series ASUS E Series ASUS F Series ASUS K Series ASUS L Series.