This adapter is equipped with sextuple protection to provide safe and stable power supply. Universal application, it is worldwide compatible with the laptop with the same interface(square tip) and the same power output / wattage(90W 20V 4.5A). Superior heat dissipation performance by sturdy exquisite quality synthetic material shell, frosted appearance, skidproof and durable, well enduring wear and tear.

Features:
Input: AC100-240V 50-60Hz (Worldwide Universal) Output: DC 20V 4.5A 90W square tip with pin inside.
Adopt fine quality electrolytic capacitors and high standard transformer, security and stability.
Overcharge protection, intelligent power supply, overcurrent, overvoltage, instant temperature and short circuit protections.
Made of high quality raw materials, which ensures low noise and ripple when the laptop in operation.
Mature manufacturing process, produced by most experienced manufacturer, advanced quality.
Strict power supply management, which keeps strong continuous power supply.
Passed various stern tests before release date, stable performance.

Specification:
Mode number: PA-1900-05
Color: Black
Input: AC100~240V 1.8A 50~60Hz
Output: 20V 4.5A
Power: 90W
Interface: Outer diameter: 11mm, inner diameter: 5mm         
Performance: Overcharge protection, intelligent power supply, overcurrent, overvoltage, instant temperature and short circuit protections
Item size: 12.5 * 5 * 3cm / 4.9 * 2 * 1.2in(L * W * H)
Item weight: Approx. 440g / 15.5oz
Package size: 20 * 13 * 6cm / 7.9 * 5.1 * 2.4in(L * W * H)
Package weight: 443g / 15.6oz

Compatible Laptop Models:
for Lenovo T431s                          X1carbon                       E431                        E435
                  E531                            E535                              B490SA                    K2450
                  K4350                          K4350A                         K4450                       K4450A
                  M4400s                       S210T                            S410P                       Z410
                  Z501                            Z505                              Z510                        Z710
                  L440                            T440                              T440P

Package list:
1 * AC Adapter
1 * Power Cable

Note: The package list without user manual.
          You can apply it for the laptop with the same power output(90W 20V 4.5A) and the same interface(square tip) if there is no model compatible with your laptop model on the webpage.
          If you are still not sure about it could work with your laptop or not, pls contact with us, we'll help you to choose. Thank you!