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Rectangular black power brick with 7.9 by 5.0 mm barrel connector and detachable mains lead

myVolts

myVolts 90W ac adapter 20V 4.5A 7.9*5.0mm for Lenovo ThinkPad

SKU CH-4AXP-J4SZV

A 90 W 20 V 4.5 A power adapter with a 7.9 mm by 5.0 mm tip for compatible Lenovo ThinkPad models

  • Worldwide voltage support with 100-240V input range
  • 90W output delivers reliable power for demanding ThinkPad models
  • 9*5.0mm connector ensures precise fit on compatible Lenovo laptops
  • Built-in safeguards protect against voltage errors short circuits and overheating
  • Includes AC adapter and power cord for immediate use

90W AC Adapter for ThinkPad

This 90W AC adapter delivers 20V at 4.5A through a 7.9*5.0mm connector. It replaces the original charger for a wide range of Lenovo ThinkPad models including the T, X, L, E, SL, R, S and B series. The unit accepts 100-240V input for worldwide use. It is a direct replacement for part numbers such as 42t4419 and 92p1157.

Continuous 90W Output with Protection

The adapter sustains a full 90W load without throttling, supplying stable 20V power during extended work sessions. Built-in safeguards protect the laptop against incorrect voltage, short circuit and internal overheating. The 100-240V, 50-60Hz input handles mains fluctuations across regions without interruption.

Plug-In Installation with Fixed Cable

Installation is limited to plugging the barrel connector into the laptop and the IEC cord into the wall. The fixed output cable cannot be detached, so a damaged lead requires full unit replacement. Verify the 7.9*5.0mm tip matches the original before ordering; some ThinkPad variants use a different diameter.

Highlights

  • Worldwide voltage support with 100-240V input range
  • 90W output delivers reliable power for demanding ThinkPad models
  • 9*5.0mm connector ensures precise fit on compatible Lenovo laptops
  • Built-in safeguards protect against voltage errors short circuits and overheating
  • Includes AC adapter and power cord for immediate use

Specifications

No published specifications for this item yet.

Questions about this item

Does the 90W adapter run hot or make fan noise when charging a ThinkPad all day?

The unit has no fan; it relies on passive cooling and built-in safeguards against internal overheating, so it stays silent during continuous use.

What must I already own to use this 20V 4.5A charger with my ThinkPad?

You need a compatible ThinkPad model that accepts a 7.9*5.0mm barrel connector and a standard IEC C7 or C5 mains lead for the included power cord.

Will this 90W unit work alongside the older 65W brick I keep for travel?

Yes — both deliver 20V through the same 7.9*5.0mm tip, so the laptop draws only the current it needs from whichever adapter is connected.

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