This product is either discontinued or we cannot get that from suppliers.
Lenovo 4X20E50586, Thinkpad 170w Ac Adapter Slim Tip, Power adapter - external, Input Voltage AC 100-240 V, Power Capacity Watt.
The Lenovo ThinkPad 170W AC Adapter 4X20E50586 is the perfect replacement or spare power supply for your ThinkPad notebook. Just plug it into an available outlet to deliver immediate power to your compatible ThinkPad laptop.