FSKE 45W 20V 2.25A Laptop Charger for Lenovo Ideapad 100S 320S 100 110 120S 310 320 330 520S Yoga 510 710 B50-50 Notebook AC AdapterPower Supply Connector: 4.0 * 1.7mm(not fit for 5.5 * 2.5mm)