| Specification | Details |
|---|---|
| Brand | Lenovo (OEM) / Compatible Replacement |
| Output Voltage | 20V DC |
| Output Current | 4.5 Amps |
| Power Rating | 90 Watts |
| Input Voltage | AC 100-240V, 50-60Hz (Worldwide compatible) |
| Connector Type | 7.9mm x 5.5mm Rectangular "Big Pin" (Also described as 7.9mm x 5.5mm round) |
| Common Part Numbers | 0B46994, 45N0237, ADLX90NDC3A, PA-1900-72, 0A36258, 5A10J46689, ADP-90DD BD |
| Cable Length | Approx. 1.8m - 3.0m |
| Warranty | 1 Year (varies by retailer) |
The Lenovo 90W Adapter (20V, 4.5A) is a high-power power supply unit designed for larger and older Lenovo laptops that require more energy than the standard 65W charger can provide . Rated at 90 watts, it is essential for powering 15-inch and larger ThinkPads, mobile workstations, and some IdeaPad series without straining the adapter .
The term "Big Pin" is critical for compatibility. Lenovo has historically used three main connector types for their 20V laptops. This adapter uses the largest of the three.
⚠️ Important: The 7.9mm x 5.5mm "Big Pin" connector is physically larger and will NOT fit the smaller 4.0mm round "Slim Tip" port used on many newer Lenovo laptops . Always verify the physical connector size before purchasing .
This 90W Big Pin adapter works with the following Lenovo laptop series (this is a partial list—many more are compatible):
When searching for a replacement, these official Lenovo part numbers correspond to this 90W Big Pin (7.9mm x 5.5mm) adapter :
| Part Number Type | Examples |
|---|---|
| OEM Part Numbers | 0B46994, 45N0237, ADLX90NDC3A, PA-1900-72, 0A36258, ADP-90DD BD, 5A10J46689 |
| Compatible P/Ns | 0B47008, ADLX90NCC3A, 45N0238, 45N0239, 36200124, 36200253 |
