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Small black square adapter with slim tip female input and USB-C male output

BUCIER

BUCIER Slim Tip to USB-C Adapter 100W PD Square Female Male

SKU CH-27DV-TV8QN

Converts a slim-tip power input to a USB-C male connector delivering up to 100 W with a built-in PD identification chip

  • ColorBlack
  • TypeUSB Type C
  • CompatibilityLenovo Thinkpad Laptop
  • AC Adapter Voltage20 volts
  • Converts slim-tip power to USB-C with built-in PD identification chip
  • Supports up to 100 W PD output at 20 V 5 A
  • Requires charger power greater than laptop power for safe operation
  • Works with Lenovo ThinkPad laptops using square slim-tip connectors
  • Compact, lightweight adapter replaces bulky power bricks for travel

Slim Tip to USB-C Adapter 100W PD

This adapter converts a Lenovo ThinkPad slim tip DC charger into a USB Type-C male output. It supports Power Delivery profiles of 5V/9V at 1.5A and 20V at 5A, with a maximum rated output of 100W. The built-in PD automatic identification chip negotiates the correct voltage for the connected device. It is intended for users who want to power modern USB-C laptops or devices using an existing square tip power supply.

Suits owners of compatible ThinkPad chargers

Buyers who need to run a USB-C laptop from a legacy 20V slim tip adapter will find this useful, provided the source charger exceeds the laptop's power draw. It does not suit anyone whose charger is rated at or below the laptop's requirement, such as a 90W charger with a 90W laptop. Users needing 12V or 15V PD output voltages should look elsewhere, as this unit only provides 5V, 9V and 20V.

Plug the square female end into the charger

Installation is a simple plug-in connection with no drivers or software required. The most common issue arises when the input charger wattage is not higher than the laptop's consumption, causing the adapter to shut down or fail to negotiate PD. Ensure the DC charger is rated above the target device, for example a 90W charger for a 65W or 86W laptop, and do not exceed the 100W adapter limit.

Highlights

  • Converts slim-tip power to USB-C with built-in PD identification chip
  • Supports up to 100 W PD output at 20 V 5 A
  • Requires charger power greater than laptop power for safe operation
  • Works with Lenovo ThinkPad laptops using square slim-tip connectors
  • Compact, lightweight adapter replaces bulky power bricks for travel

Specifications

BrandSinLoon
ModelSquare
ColorBlack
TypeUSB Type C
CompatibilityLenovo Thinkpad Laptop
AC Adapter Voltage20 volts

Questions about this item

My charger has a slim-tip plug — will this adapter let me power my USB-C laptop?

Yes — the adapter accepts a 15 V–20.5 V slim-tip input and delivers PD 5 V/9 V at 1.5 A or 20 V at 5 A from its USB-C male end, provided your charger’s wattage exceeds the laptop’s draw.

I still use a 90 W square-tip Lenovo brick — can it run a 65 W USB-C ThinkPad through this adapter?

The 90 W brick supplies 20 V, which meets the adapter’s 15 V–20.5 V input range; since 90 W is higher than the 65 W laptop load, the built-in PD chip will negotiate 20 V at up to 5 A and the laptop will charge.

After plugging everything in, how do I know the adapter is actually delivering 20 V to my laptop?

The laptop’s battery indicator will show charging at 20 V; if it only shows 5 V or 9 V, the source charger is likely below the required 15 V minimum or its wattage is not higher than the laptop’s rating.

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