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 4.5A 90W 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            Square 3-pin plug in US standard, the AC adapter is in a good conditionLow interference and noiseAdvanced technology and high quality ensure the excellent performanceHigh efficiency and reliabilityShort circuit, overheating and over voltage protectionDurable and well-made, guarantees long term useEasy and safe to use                                                            Specifications            Input    AC 100-240V, 2.0A, 50/60Hz    <br>
Output    20V, 4.5A    <br>
Power    90W    <br>
Color    Black    <br>
Connecter Type    USB with PIN    <br>
Adapter Dimensions    (5.04 x 1.97 x 1.22)" / (12.8 x 5 x 3.1)cm (L x W x H)    <br>
Weight    11.67oz / 331g    <br>
Compatible with    IBM Lenovo ThinkPad Edge E431 E531    <br>
                                                            Package Includes            1 x AC Adapter1 x Power Cord