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Black rectangular AC adapter with US two-prong plug and 4.0mm barrel connector

myVolts

myVolts 45W 20V 2.25A AC Adapter 4.0mm 1.7mm US Plug

SKU CH-1V9P-3538K

45 W 20 V 2.25 A replacement charger with 4.0 mm by 1.7 mm tip and US plug for compatible Lenovo laptops

  • 45W output powers compatible Lenovo laptops efficiently
  • 100-240V input works worldwide without a voltage converter
  • 0mm by 1.7mm connector fits listed Yoga, IdeaPad, Flex and B-series models
  • Built-in protection chip guards against over-voltage and short circuits
  • 12-month manufacturer warranty covers defects in materials and workmanship

What this adapter powers

This 45W AC adapter delivers 20V at 2.25A through a 4.0mm by 1.7mm barrel connector. It is built as a direct replacement for the Lenovo PA-1450-55LL and matching part numbers listed in the compatibility data. The unit accepts 100-240V input at 50-60Hz with a two-prong US plug for worldwide mains compatibility.

Heat noise and power behaviour

The adapter uses an intelligent circuit protection chip to regulate output voltage accurately. Its ABS+PC non-combustible shell is rated for high-temperature operation. No active cooling is present, so the unit runs silently while converting mains power to the 45W DC load required by the supported laptops.

Build connectors and daily fit

The fixed 4.0mm outer and 1.7mm inner diameter barrel plug mates with the charging ports on the listed Lenovo Yoga, IdeaPad, Flex and B-series models. A moulded strain relief reinforces the cable exit point. The two-prong US plug inserts directly into a wall outlet or travel adapter without a separate IEC lead. Buyers who need a different plug style or a higher wattage unit should look elsewhere.

Highlights

  • 45W output powers compatible Lenovo laptops efficiently
  • 100-240V input works worldwide without a voltage converter
  • 0mm by 1.7mm connector fits listed Yoga, IdeaPad, Flex and B-series models
  • Built-in protection chip guards against over-voltage and short circuits
  • 12-month manufacturer warranty covers defects in materials and workmanship

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 4.0mm by 1.7mm connector and what step do people get wrong?

Align the 4.0mm outer and 1.7mm inner diameter precisely with the laptop port before pushing straight in; the common error is forcing it at an angle which bends the centre pin.

What maintenance or replacement will this 45W 20V 2.25A adapter need later?

The 2-prong US plug and cable insulation should be inspected every 12 months for cracks or overheating marks; replace the unit if the output voltage drifts from 20V under load.

What limit appears first when the adapter runs continuously at 45W?

The ABS+PC non-combustible shell reaches its safe temperature ceiling before the internal protection chip triggers, so sustained full-load operation is limited by case heat dissipation.

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