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Rectangular black power brick with 7.9mm barrel connector and detachable mains lead

myVolts

myVolts 90W AC Adapter 20V 4.5A 7.9mm Lenovo ThinkPad

SKU CH-WXCB-3JT31

90 W, 20 V 4.5 A charger with a 7.9 mm connector for many Lenovo ThinkPad models

  • Worldwide 100-240 V input for travel convenience
  • 90 W 20 V 4.5 A output powers demanding ThinkPads
  • 9 mm connector fits listed Lenovo models directly
  • Built-in safeguards against voltage error short circuit overheating
  • Package includes AC adapter and power cord

90W AC Adapter for ThinkPad

This 90 watt AC adapter delivers 20 volts at 4.5 amps through a 7.9 by 5.0 millimetre connector. It accepts 100 to 240 volt input at 50 to 60 hertz for worldwide use. The unit includes built‑in safeguards against incorrect voltage, short circuit and internal overheating. A power cord is supplied in the box.

Owners of listed ThinkPad models

The adapter matches the part numbers and model ranges shown in the compatibility list, covering many T, X, L, R, SL, Edge, E, B and S series laptops. It is not for ThinkPads that require a different voltage, amperage or connector size. Buyers who need a higher wattage unit or a USB‑C power source should look elsewhere.

90 watt capacity and headroom

At 90 watts the adapter comfortably runs the supported ThinkPads under typical workloads and charges the battery while the system is in use. It will not support models that demand more than 90 watts or that use a different DC plug. Users with docking stations that draw additional power should verify their total load stays within this limit.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $32.99
Pricier than about 57% of the 27,790 comparable items (median $30.99).

Specifications

No published specifications for this item yet.

Questions about this item

Do I need a separate mains cable for the 7.9 mm connector?

The package includes a 100-240V power cord, so no extra mains cable is required.

Will this 90W adapter charge a ThinkPad X220 that originally used a 65W unit?

Yes, the 20V 4.5A output matches the X220 and the adapter safely regulates to the laptop's needs.

How can I confirm the adapter is delivering 20V 4.5A after plugging it in?

The laptop battery icon will show charging at full speed and the adapter's LED remains steady green.

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