Made of high quality material as well as delicate workmanship， the AC adapter performs well on stability. This adapter is designed into square 3-pin plug in US standard， which allows it to bring you much convenience. Adopting advanced technology， it is specially designed with built-in protection to protect your computer against unexpected power surge damages. With this power adapter， you could timely charge your laptop to support its continuous working. Would you like to get this 20V 3.25A 650W US Standard Square 3-Pin Plug AC Adapter for IBM Lenovo ThinkPad Edge E431 E531 Black back to replace the old one? Come on!                                    Features               <br> Square 3-pin plug in US standard， the AC adapter is  in a good condition<br> Low interference and noise<br> Advanced technology and high quality ensure the excellent performance<br> High efficiency and reliability<br> Short circuit， overheating and over voltage protection<br> Durable and well-made， guarantees long term use<br> Easy and safe to use <br>                                                            Specifications             Input     AC 100-240V， 1.5A， 50/60Hz    <br> Output     20V， 3.25A    <br> Power     65W    <br> Color     Black    <br> Connecter Type     USB with PIN    <br> Adapter Dimensions     (4.21 x 1.77 x 1.18)" / (10.7 x 4.5 x 3)cm (L x W x H)    <br> Weight     9.62oz / 273g    <br> Compatible with     IBM Lenovo ThinkPad Edge E431 E531    <br> Plug Type     US Standard， 3 Pins     <br>                                                             Package Includes            1 x AC Adapter<br>1 x Power Cord<br>