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Black rectangular Lenovo 135W USB-C AC adapter

Lenovo

Lenovo 4X21H27800 135W USB-C AC Adapter

SKU CH-Q3NY-TKDG7 MPN 4X21H27800

135 W USB-C power adapter charges compatible ThinkPad laptops at home, in the office or on the go

  • Main functionInternet Tablet
  • Product colorBlack
  • Product typeAC Adapter
  • Product weight420 lb (191 kg)
  • 135W output delivers fast charging for ThinkPad laptops
  • USB-C connector fits modern ThinkPad models
  • OS independent operation works with any compatible system
  • 00 lbs weight makes it portable for travel use
  • Genuine Lenovo part 4X21H27800 ensures reliable compatibility

Replacement Power for ThinkPad

The Lenovo 4X21H27800 is a 135W USB-C AC adapter built for ThinkPad laptops and tablets. It serves as a direct replacement or a spare unit for professionals who need reliable power at a desk or while travelling. The adapter is operating-system independent and ships in new condition.

Sustained 135W Delivery

Rated at 135 watts, the brick maintains its full output during long charging sessions rather than throttling after a short burst. The USB-C connection negotiates power with the host so the laptop receives consistent current while under heavy workloads. A 420.00 lb weight figure is listed in the supplier data for logistics purposes.

135W USB-C Output Decides Fit

The single specification that determines compatibility is the 135W USB-C output; devices requiring a different wattage or a barrel connector will not work with this unit. Buyers who need a lower-wattage travel charger or a legacy slim-tip adapter should look elsewhere. Verify your ThinkPad model accepts 135W over USB-C before purchase.

How it compares

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

Price $60.99
Pricier than about 90% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameLenovo
Model name4 × 21H27800
Part number4 × 21H27800
Product colorBlack
Product typeAC Adapter
Size & build
Product weight420 lb (191 kg)
Shipping weight0.57 kg
Package size260 × 108 × 51 mm
More details
Main functionInternet Tablet

Questions about this item

How much heat does the 135W USB-C adapter produce when powering a ThinkPad continuously?

The unit draws up to 135 watts; typical AC adapters of this class run warm but stay within normal operating temperatures during all-day use.

Which cable or connector must I already have to connect this adapter to my laptop?

Your ThinkPad needs a USB-C charging port that accepts 135 W input; the adapter ships with a fixed USB-C output cable.

Will the 135W USB-C adapter work with my older ThinkPad that uses a rectangular slim-tip connector?

No — this model only supplies power through its USB-C plug, so it cannot connect to legacy slim-tip ports.

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