We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black rectangular AC adapter with 4.0 mm barrel connector and detachable power cord

Kenuco

Kenuco 45W 20V 2.25A AC Adapter 4.0mm IdeaPad 1 3 5 Series

SKU CH-RK67-085ZS

Delivers 45 W at 20 V 2.25 A via a 4.0 mm tip for IdeaPad 1, 3, 5 and many other models

  • Product typeAC Adapters
  • Delivers 45 W at 20 V 2.25 A for reliable charging
  • Works with IdeaPad 1 3 5 100 110 120 130 310 320 330 510 520 710 series
  • Accepts 100-240 V input for worldwide use
  • Fits 4.0 mm x 1.7 mm barrel connector on supported models
  • Includes AC adapter power cable and manual in the box

45 W AC adapter for IdeaPad 1 3 5 series

This 45 W AC adapter supplies 20 V at 2.25 A through a 4.0 × 1.7 mm barrel connector. It is built for Lenovo IdeaPad 1, 3 and 5 series laptops including models such as 1-14, 3-15 and 5-14. The package includes the adapter, an AC power cable and a manual.

Thermals noise and power draw

The unit accepts a 100-240 V input range for worldwide use. Under normal load it delivers a steady 45 W output without fan noise because the design is passively cooled. Heat dissipation is handled by the external casing during typical charging sessions.

Connector size decides compatibility

The 4.0 × 1.7 mm tip fits the listed IdeaPad 1 3 5 series and many IdeaPad 100 110 110S 120S 130 130S 310 320 330 330S 510 520 710 720 models. Buyers whose laptops require a different barrel diameter or a USB-C power input cannot use this adapter.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $21.99
Cheaper than about 68% of the 27,790 comparable items (median $30.99).

Specifications

Product
Product typeAC Adapters

Questions about this item

How do I connect the 4.0 mm barrel plug to my IdeaPad 3 15 without forcing it?

Align the 4.0 mm by 1.7 mm centre-positive tip straight into the DC jack, push until it seats fully, then plug the IEC C7 cord into the brick and wall outlet; the step most people skip is checking the pin orientation before inserting.

Which part of this 45 W adapter will wear out first and need replacing?

The detachable AC power cord and the DC cable near the 4.0 mm connector see the most flexing; inspect both periodically and swap the cord or the whole unit if insulation frays or the plug becomes loose.

What limits continuous output when I run my IdeaPad 5 14 at full load for hours?

The brick is rated 20 V at 2.25 A for 45 W maximum; sustained loads at that level will hit the thermal protection circuit first, causing the adapter to throttle or shut down until it cools.

More in Laptop Chargers & Batteries

Similar items