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Dong Cheng 20 V brushless, 800 Nm review

A brushless cordless wrench at a stated 800 Nm and 2.2 kg (4.9 lb) with battery, with three torque stages published as figures rather than as icons.

The last word Publishes what its stages do. That is more than most cordless wrenches manage.

What lands on the bench

A brushless 20 V cordless impact wrench stated at 800 Nm, weighing 2.2 kg (4.9 lb) with its battery, with three published torque stages and three LEDs.

The lighting is not a gimmick

A single LED on the body of a tool throws the shadow of the tool itself onto the fastener. Three lights around the head remove it, which is the difference between seeing the socket seat and hoping it did.

Brushless, and why it matters here

More torque per amp-hour and less heat, so a small battery does more work. On a tool used in short bursts against seized fasteners, that is exactly where the benefit lands.

The platform question

The battery is the long-term commitment, not the tool. If you already own another platform, that is a legitimate reason to choose differently.

Availability

Not found on the American Amazon store, where the buy link falls back to a local search rather than to a page that does not exist.

Prices and availability are what Keepa reported on the date this page was updated; both move.

What it does, and what it misses

Strengths

  • Publishes the torque of its stages, not just the maximum — which is what makes a selector usable
  • 2.2 kg (4.9 lb) with the battery is light for this torque class
  • Three LEDs around the head rather than one on the body, which removes the shadow your own hand casts

Compromises

  • A proprietary battery platform most households do not already own
  • 800 Nm is a maximum figure, and the listing does not distinguish loosening from fastening torque
  • Brand less established in Europe than the alternatives here

Specifications

PlatformCordless 20 V, brushless motor, stated
Maximum torque800 Nm, stated
Torque stagesThree stages, with 0–431 and 0–507 Nm among the published figures
Weight2.2 kg (4.9 lb) with battery, stated
Lighting3 LEDs around the tool head, stated
ExtraABR function, stated
Amazon referenceB0FG2JBZQM
EAN6927073953726

The questions that reach us

Why do the stage figures matter?

Because a three-stage selector with no published values is three unknown settings. Stages given in newton-meters let you choose deliberately rather than by trial.

Is 800 Nm too much for a car?

For loosening, more is simply faster and less likely to round a fastener through repeated attempts. For tightening, the number is irrelevant — that job belongs to a torque wrench.

Our score

7.8/ 10

Publishes what its stages do. That is more than most cordless wrenches manage.

This one’s price among garage tools

A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom. Listed is not the same as in stock — availability changes daily.

Details checked on September 4, 2026.

Who should pick this one, among garage tools

Someone starting a battery platform from scratch and wanting torque per euro.

Our garage tools guides that pick it

Sources

Specifications: the manufacturer sheet for garage tools and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.

The method applied to these garage tools