We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black rectangular 90 W AC adapter with 7.9 mm barrel connector

POWER-FENG

POWER-FENG 90 W AC adapter 20 V 4.5 A for Lenovo ThinkPad

SKU CH-ASFY-5Y3XJ

90 W AC adapter delivers 20 V at 4.5 A via 7.9 mm × 5.5 mm tip for compatible Lenovo ThinkPad models

  • Product typeBattery
  • World-wide voltage input lets you charge anywhere
  • 90 W output powers demanding ThinkPad models
  • 20 V 4.5 A delivery matches original specifications
  • 9 mm by 5.5 mm tip fits listed laptops
  • Replaces multiple Lenovo part numbers for easy sourcing

90 W AC Adapter for ThinkPad

This 90 W AC adapter delivers 20 V at 4.5 A through a 7.9 mm by 5.5 mm barrel connector. It is built for owners of compatible Lenovo ThinkPad models who need a replacement power supply. The unit accepts worldwide mains input from 100 V to 240 V at 50 Hz to 60 Hz.

Fits listed ThinkPad models directly

The adapter matches part numbers SA10M42797, 45N0249, 01FR052, 45N0500, 42T4422, 42T4423, 40Y7657 and 40Y7699. It powers ThinkPad T400, T410, T420, T430, T430u, W500, Twist and S230u laptops without extra cables or converters. The fixed barrel tip means the laptop must use this exact connector size.

Steady 90 W output under load

Continuous operation at the rated 20 V and 4.5 A is supported by the 100–240 V input range. The adapter maintains stable voltage during extended charging and high-demand sessions. It is not suited for laptops requiring higher wattage or a different voltage, tip polarity or connector diameter.

How it compares

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

Price $28.99
Typical for this category: the median of 27,790 items is $30.99.

Specifications

Product
Product typeBattery

Questions about this item

Will the 90 W output sustain a full-load ThinkPad without throttling?

The adapter delivers 20 V at 4.5 A for a continuous 90 W, matching the original SA10M42797 and 45N0249 part numbers so the laptop draws its rated power without throttling.

How hot or loud does the brick get when left plugged in all day?

It is a sealed 90 W switching supply with no fan; under constant load it warms to typical external-brick temperatures but produces no audible noise.

Which ThinkPad models already use the 7.9 mm × 5.5 mm tip so I don't need a new cable?

The 7.9 mm × 5.5 mm barrel fits ThinkPad T400, T410, T420, T430, T430u, W500, Twist and S230u models that shipped with part numbers 42T4422, 42T4423, 40Y7657 or 40Y7699.

More in Laptop Chargers & Batteries

Similar items