eForChina 5.5 x 2.1 mm to Square USB Power Adapter Gender Changer 13 cm

Laptop power adapter with square input

This adapter cable connects a laptop that uses a square power port to a standard 5.5 mm round barrel plug. The female square input accepts the proprietary connector found on certain ThinkPad, ThinkBook and Xiaoxin models. The male 5.5 mm output fits common 2.1 mm or 2.5 mm barrel jacks. The cable length is about 13 cm.

Replaces proprietary square charger tip

It lets owners of square-port laptops use an existing round-barrel power supply or universal charger instead of the original square-tip brick. The jump is worth it when the original square-tip adapter is lost, damaged or unavailable and a compatible round-tip source is already on hand. No internal voltage conversion is performed; the source must already match the laptop's requirements.

Handles 5.5 mm barrel compatibility

The 13 cm lead comfortably reaches a power brick sitting on a desk while the laptop rests nearby. It runs out when the power source uses a barrel size other than 5.5 mm outer diameter with 2.1 mm or 2.5 mm inner diameter. Buyers who need a different barrel size, a longer cable or a USB-C power input cannot use this adapter.