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Black rectangular 135W AC adapter with detachable power cord

OnlineHawk

OnlineHawk 135W AC Adapter for Lenovo ThinkPad Thunderbolt 3 Dock Gen 2 Pro

SKU CH-G7SB-GAPWD

135W AC adapter powers Lenovo ThinkPad Thunderbolt 3 Dock Gen 2 Pro with 20V 6.75A output and 100-240V input

  • Battery typeLithium-Ion
  • Delivers 135 W to power the ThinkPad Thunderbolt 3 Dock Gen 2 Pro
  • Wide 100–240 V input works on mains worldwide
  • Built-in short-circuit, over-voltage, over-current and over-temperature protection
  • Supplies 20 V at 6.75 A for stable dock operation
  • Includes AC charger and power cord for immediate setup

What this adapter powers

The OnlineHawk 135W AC adapter replaces the original power supply for the Lenovo ThinkPad Thunderbolt 3 Dock Gen 2 Pro. It delivers 20V at 6.75A to keep the dock and connected laptop running from a 100-240V 50-60Hz mains supply. The unit includes the charger and a detachable power cord.

Capacity and headroom

Rated at 135W output, the adapter comfortably supplies the dock’s full power budget for charging a laptop and driving downstream USB peripherals. Headroom disappears when the dock simultaneously fast-charges a high-draw notebook and powers multiple bus-powered devices; sustained loads above the rated output will trigger the built-in protection circuits.

Thermals, noise and power draw

The adapter operates silently with no moving parts. Normal use sees the brick warm to the touch as it converts up to 135W, while safety mechanisms guard against short circuit, overvoltage, overcurrent and internal overheating. Input current scales with load across the 100-240V range.

How it compares

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

Price $35.99
Pricier than about 64% of the 27,790 comparable items (median $30.99).

Specifications

Power
Battery typeLithium-Ion

Questions about this item

Will the 135 W adapter run the Thunderbolt 3 Dock Gen 2 Pro alongside my older ThinkPad that uses a lower-wattage supply?

The adapter delivers 20 V at 6.75 A for 135 W, matching the dock's required input, so it powers the dock regardless of the laptop's own supply rating.

How can I confirm the adapter is operating correctly once connected?

The dock's power LED illuminates when the adapter supplies 20 V 6.75 A, and the safety protections against short circuit, overvoltage, overcurrent and overheating engage automatically if a fault occurs.

What comes in the box and what must I source separately?

The package includes one AC charger and one power cord; no additional cables or connectors are required for the Thunderbolt 3 Dock Gen 2 Pro.

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