Mackertop 45W (20V 2.25A) Laptop Charger Power Adapter Replacement for Lenovo Yoga 2 11 11S S1 K2450 T431S X240 X240S ADLX45NDC3A ADLX45NLC3A ADLX45NCC3A ADLX45NCC2A (X240) Input: 100~240V~1.5A 50/60Hz; Output: 20V~2.25A Compatible with Lenovo Thinkpad X240 T431s X230s X240s Connector: yellow square tip CE / FCC / RoHS Certified, tested by the manufacturer to match and / or exceed the OEM specifications Warranty: 12 months warranty, 30 days money return guarantee, 24 x 7 email support