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Short black adapter cable with barrel socket and two proprietary plugs

eForChina

eForChina 5.5x2.1mm Female to YOGA 3 & Big Square USB Male Power Adapter Cable 30cm

SKU CH-E19R-466YJ

Connects a 5.5×2.1 mm power jack to Lenovo Yoga 3 or first-generation big-square USB tips in a 30 cm cable

  • Adapter typePower Adapter
  • Connects legacy barrel power to modern USB-C Yoga tips
  • 5x2.1mm female fits older ThinkPad chargers
  • YOGA 3 & big square male plugs into newer laptops
  • 30 cm length keeps desk tidy and portable
  • Small lightweight build slips into any laptop bag

Power Adapter Cable for ThinkPad ThinkBook Xiaoxin

This 30 cm cable converts a 5.5x2.1 mm female power jack to YOGA 3 and first-generation big square male connectors. It supports Lenovo ThinkPad, ThinkBook and Xiaoxin laptops. The compact design makes it easy to carry in a laptop bag.

Suitable Adapters and Incompatible Connectors

Users with matching barrel and proprietary square ports can power their devices from a standard 5.5x2.1 mm source. Buyers whose laptops use USB-C charging, slim-tip connectors or other proprietary tips will need a different adapter. No other connector types are supported by this cable.

30 cm Length and Dual Male Output

The cable measures approximately 30 cm from end to end. One end presents a 5.5x2.1 mm female socket while the other end splits into two male plugs: a YOGA 3 tip and a first-generation big square tip. This fixed length and dual-output layout determine whether the adapter reaches your power brick and fits your laptop.

How it compares

Measured against everything we stock in Other Adapters & Couplers, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 77% of the 1,761 comparable items (median $18.99).

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Specifications

Product
Adapter typePower Adapter

Questions about this item

Which power brick must I already own to use the 5.5×2.1 mm female connector?

You need a power supply or adapter that provides a 5.5 mm outer and 2.1 mm inner barrel plug; the cable simply passes that power through to the laptop tips.

Will the YOGA 3 and big square (First Generation) tips fit older ThinkPad models that use the same square connector?

Yes, the big square tip matches the first‑generation square connector found on earlier ThinkPad, ThinkBook and Xiaoxin laptops, so those devices can be powered from the same brick.

How can I confirm the adapter is delivering power after I plug everything in?

The laptop’s charging LED should illuminate and the battery icon will show a charging state once the barrel plug, cable and correct tip are all securely connected.

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