Lenovo 90W 19V 4.74A Power Adapter 5.5mm*2.5mm

Lenovo 90W 19V 4.74A Power Adapter 5.5mm*2.5mm

Genuine Lenovo 90W 19V 4.74A Power Adapter 5.5mm*2.5mm

Input: 100-240V ~ 4.4 A- 50/60Hz

Output: 90W 19V 4.74A

Connecter Size: 5.5mm*2.5mm

Part Numbers: 42T4456, 42T4457, ADP-90RH B

Please ensure the product(s) that you are going to buy fits the brand, model and part number of your device

This Laptop ac adapter can replace the following part numbers:

• 42T4457
• ADP-90RH B
• Lenovo 42T4456

Disclaimer:

The Laptop ac adapter supplied by our Company are [replacement for] sold for use with certain products of computer manufacturers, and any reference to products or trademarks of such companies is purely for the purpose of identifying the computer manufacturers with which our products [are replacement for] may be used. Our Company and this Website are neither affiliated with, authorized by, licensed by, distributors for, nor related in any way to these computer manufacturers, nor are the products offered for sale through our Website manufactured by or sold with the authorization of the manufacturers of the computers with which our products [are replacement for] may be used.

This laptop ac adapter is rigorously tested, meets or exceeds original laptop ac adapter's specifications, brand new with 1 year warranty. Our AC Adapter has ±1V Voltage allowance.

1. Before ordering this replacement ac adapter, you MUST check your laptop's input voltage and your original ac adapter's output voltage. Laptops with 18V-20V input voltage can use our ac adapter which has 19V output voltage; Laptops with 15V-17V input voltage can use our ac adapter which has 16V output voltage; Remember: never exceed ±1V tolerance. Using wrong output voltage adatper will damage your laptop.
2. You can calculate your original ac adapter's output Wattage [W] by multiplying the Ouput Voltage [V] by output current [Amps] i.e 19V X 4.74A = 90 Watts. You can choose a replacement ac adapter which has higher Amps than your original ac adapter's; but you can not choose an ac adapter which has lower Amps than your original ac adapter's because it can not provide sufficient power to your laptop. Adapters with higher Amps will not damage your laptop. The adapter's output current (Amps) and output power (watts) are maximum load ratings. Computers only draw as many amperes or watts as they need.
3. Please carefully check the plug tip's size of the adapter to make sure it can fit into your computer. First of all, please make sure that your original adapter's part number and your laptop's model number are listed below.