Lenovo Original 170w Slim Tip Ac Adapter ( 4X20E50574 ， Retail Packaged )<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>For ThinkPad T440p/T540p/W540 ， see product description for all compatibility models</li><li>ThinkPad AC chargers are compact so they are highly portable</li><li>They are energy efficient with an Energy Star V (ES 2.0) rating and are backed by a 1 year official Lenovo warranty</li><li>This 170w adapter is only compatible with ThinkPad laptops with rectangular “slim tip” common power plugs</li><li>It is not compatible with pre-2013 ThinkPad laptops with the round， barrel-type power plug</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41EL3FeLZdL.jpg" noproxy>