Lenovo Laptop Charger 45W for Lenovo IdeaPad 100 120S 300 310 310S 320 320S 330 330S 510 510S 520 710 330S-15IKB 330S-14IKB 320-15IKB S340 S130 S145 S540 Power Supply Adapter (4.0 * 1.7mm)