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Black rectangular AC adapter with 7.9mm by 5.5mm barrel connector

myVolts

myVolts 90W 20V 4.5A AC adapter 7.9mm*5.5mm

SKU CH-QKQS-JN458

90 W 20 V AC adapter with 7.9 mm × 5.5 mm connector for compatible Lenovo ThinkPad and 3000 series laptops

  • Delivers 90 W for demanding workloads
  • Universal 100–240 V input for worldwide use
  • 9 mm × 5.5 mm connector fits listed ThinkPad models
  • Replaces 14 original Lenovo part numbers
  • CE, FCC and RoHS certified for safety

90 W AC adapter for ThinkPad

This 90 W power supply delivers 20 V at 4.5 A through a 7.9 mm by 5.5 mm three-prong connector. It replaces a wide range of Lenovo part numbers across ThinkPad T, X, L, Edge, SL, R, Z and 3000 series models. The unit accepts 100–240 V input at 1.5 A for worldwide use.

Thermals and power draw

The adapter runs on standard mains frequency of 50 or 60 Hz and is rated for 1.5 A input current. Built-in overcharge and discharge protection circuits limit heat buildup during extended charging sessions. No active cooling is required, so operation remains silent in normal use.

Build and daily use

The housing carries CE, FCC and RoHS certifications confirming compliance with safety and environmental standards. A fixed barrel connector with three pins ensures a secure fit on compatible ThinkPad sockets. The brick-style form factor sits on a desk or travels in a bag without protruding controls.

Highlights

  • Delivers 90 W for demanding workloads
  • Universal 100–240 V input for worldwide use
  • 9 mm × 5.5 mm connector fits listed ThinkPad models
  • Replaces 14 original Lenovo part numbers
  • CE, FCC and RoHS certified for safety

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 7.9mm*5.5mm 3-prong connector on my ThinkPad?

Align the 7.9mm outer and 5.5mm inner diameters with the laptop's DC-in jack, then press the 3-prong plug straight in until it seats fully. The step people miss is checking that the centre pin slides into the middle hole before applying force, otherwise the adapter will not deliver the 20V 4.5A output.

What maintenance or replacement will this 90W adapter need later?

No internal user-serviceable parts exist. Keep the inlet vents clear of dust, avoid bending the cable near the strain relief, and replace the unit if the output drops below 20V 4.5A or the 3-prong connector becomes loose.

What limit appears first when the adapter runs at 90W continuously?

The 100-240V~1.5A 50/60Hz input rating and built-in overcharge and discharge circuit protection set the thermal ceiling; sustained 90W load will trigger the protection circuit before any other component reaches its limit.

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