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Black rectangular AC adapter with USB output cable

POWER-FENG

POWER-FENG 20V 4.5A USB laptop AC adapter

SKU CH-RJQ4-QHB1X

20 V 4.5 A USB adapter powers compatible Lenovo IdeaPad and ThinkPad laptops from 100–240 V mains

  • TypeBattery
  • Worldwide voltage input works from 100 to 240 V
  • 20 V 4.5 A USB output powers compatible Lenovo laptops
  • Replaces part numbers SA10M42797 45N0249 01FR052 45N0500
  • Fits Ideapad S210 S500 S510p U430 and ThinkPad L440 L540 T440 G500
  • Brand new condition ready for immediate use

Replacement AC adapter for Lenovo laptops

This 20 V 4.5 A USB power supply replaces the original adapter for a range of Lenovo IdeaPad and ThinkPad models including the S210 S500 S510p U430 L440 L540 T440 Essential G500. It accepts 100 to 240 V input at 50 to 60 Hz for worldwide use.

Output specification determines compatibility

The adapter delivers a fixed 20 V at 4.5 A through a USB connector matching part numbers SA10M42797 45N0249 01FR052 45N0500 59373039 0B46994 0B47008. Buyers who need a different voltage or a barrel connector cannot use this unit.

Continuous load behaviour

Designed to sustain the rated 20 V 4.5 A output during extended charging sessions without thermal throttling. The wide input range maintains stable output across mains variations. Users who require higher wattage for docking stations or discrete GPU workloads should look elsewhere.

Highlights

  • Worldwide voltage input works from 100 to 240 V
  • 20 V 4.5 A USB output powers compatible Lenovo laptops
  • Replaces part numbers SA10M42797 45N0249 01FR052 45N0500
  • Fits Ideapad S210 S500 S510p U430 and ThinkPad L440 L540 T440 G500
  • Brand new condition ready for immediate use

Specifications

TypeBattery

Questions about this item

What does the 20V 4.5A output mean for my laptop?

It supplies up to 90 W of power, matching the original adapter for compatible Lenovo models.

What connector standard does the USB output use?

The adapter delivers 20 V at 4.5 A through a USB port that follows the required power profile for the listed laptops.

Will this fit the charging port on my ThinkPad T440?

Yes, the tip is designed for the SA10M42797, 45N0249, 01FR052 and 45N0500 part numbers used by the T440 and other listed models.

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