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Black rectangular 45W AC adapter with 4.0mm round tip and detachable power cord

myVolts

myVolts 45W AC Adapter 4.0mm Round Tip for Lenovo Chromebook N23 N42-20 N22-20 100e 300e 500e Winbook

SKU CH-3JKP-QTSJP

45W AC adapter with 4.0mm round tip powers compatible Lenovo Chromebook N23, N42-20, N22-20, 100e, 300e, 500e and Winbook models

  • 45W output delivers reliable power for compatible Lenovo Chromebooks
  • 0 mm round tip fits N23, N22-20, N42-20, 100e, 300e, 500e and Winbook models
  • 100-240V input works worldwide without a voltage converter
  • Built-in safeguards protect against incorrect voltage, short circuit and overheating
  • Includes AC adapter and detachable power cord for immediate use

45W AC Adapter with 4.0mm Round Tip

This 45W power supply delivers 20V at 2.25A for Lenovo Chromebook N23, N42-20, N22-20, 100e, 300e, 500e and Winbook models. It accepts a universal 100-240V input at 50-60Hz and ships with both the adapter and a detachable power cord. The connector measures 4.0mm by 1.7mm and is not interchangeable with smaller tips or USB-C ports.

Replacing a lost or failing 45W round-tip charger

Swap this unit in when the original adapter is missing, damaged or no longer holds a stable charge. The upgrade is worth it only if your device requires the 4.0mm round tip and 45W output; it will not fit models that use a 3.0mm tip or USB-C charging. Built-in safeguards protect against incorrect voltage, short circuit and internal overheating.

45W output for compatible Chromebooks and Winbooks

The adapter comfortably powers the listed Lenovo series during typical classroom or office workloads. It runs out of headroom if a device demands more than 45W or uses a different connector type. The package includes one AC adapter and one power cord, backed by a 12-month manufacturer warranty and a 30-day return window.

Highlights

  • 45W output delivers reliable power for compatible Lenovo Chromebooks
  • 0 mm round tip fits N23, N22-20, N42-20, 100e, 300e, 500e and Winbook models
  • 100-240V input works worldwide without a voltage converter
  • Built-in safeguards protect against incorrect voltage, short circuit and overheating
  • Includes AC adapter and detachable power cord for immediate use

Specifications

No published specifications for this item yet.

Questions about this item

Does the 4.0 mm × 1.7 mm round tip fit my Lenovo Chromebook N23?

Yes, the connector is 4.0 mm × 1.7 mm and matches the N23, N22-20, N42-20, 100e, 300e, 500e and Winbook series; it will not fit the smaller 3.0 mm × 1.1 mm tip or USB-C ports.

What is the correct way to plug in the adapter so the laptop charges reliably?

Connect the IEC power cord to the brick first, then insert the 4.0 mm round tip firmly into the laptop’s DC jack until it seats; reversing the order can leave the tip loose and prevent charging.

When should I replace the AC adapter or its detachable power cord?

Replace the unit if the brick becomes unusually hot, the output drops below 20 V 2.25 A, the cord insulation cracks, or the round tip feels loose in the jack after normal use.

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