UpBright Original 170W 20V 8.5A AC / DC Adapter For Lenovo ThinkPad W510 Series: Lenovo ThinkPad W510 4319-5XU, Lenovo ThinkPad W510 4319-64U, Lenovo ThinkPad W510 4319-65U, Lenovo ThinkPad W510 4389-22U, Lenovo ThinkPad W510 4389-23U, Lenovo ThinkPad W510 4389-24U, Lenovo ThinkPad W510 4389-2SU, Lenovo ThinkPad W510 4389-2TU, P/N: 55Y9317, 45N0052, 45N0053, 45N0054, 45N0055, 45N0056, 45N0057, 45N0058, 45N0059, 55Y9317, 55Y9318, 55Y9319, 55Y9320, 55Y9321, 55Y9322, 55Y9323, 55Y9324, 55Y9325, 55Y9326, 55Y9327, 55Y9328, 55Y9329, 55Y9330, 55Y9331, 55Y9332, 57Y4622 135W - 170W HIGH POWER Power Supply Cord Charger PSU World Wide Input Voltage 100-240VAC 50/60Hz OVP, OCP, SCP Protection (OVP: Over Voltage output Protection. OCP: Over Current output Protection. SCP: Short Circuit output Protection) Tested Units. In Great Working Condition. UpBright 30 days money back guarantee. 1 full year service warranty.