# Dong Cheng 1/2in Brushless Impact Wrench, 682 Nm

Source: https://www.ranked10.co.uk/home/best-impact-wrenches/dong-cheng-brushless-impact-wrench
Ranked #6 in "Best Cordless Impact Wrench 2026: 10 Ranked, Torque Claims Checked": https://www.ranked10.co.uk/home/best-impact-wrenches

- Price: £65.99 (checked on Amazon UK on 2026-09-19)
- Amazon rating: 4.5 from 120 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0DMNGF624?tag=ranked10-21

The Dong Cheng 1/2 inch Brushless Impact Wrench sits at number six in this guide, at £65.99 with a 4.5-star average from 120 ratings. It is the clearest example of the pattern running through this list: the big number in the product name is the loosening figure, not the tightening one. The listing's own bullets give 682 N.m of breakaway torque and 488 N.m of tightening force, and the model number is DCPB488DM — 488, not 682.

What separates this from the three cordless tools in the guide that arrive without a battery is the contents list: one 4.0Ah battery, a fast charger, five impact sockets (17, 19, 21, 22 and 24mm), two pins, two O-rings, a belt clip and a storage box. There is one small conflict inside the same listing worth flagging: a bullet describes "4.0Ah large-capacity batteries" in the plural, while the included-components line and the set name both say one battery. Everything on this page comes from the Amazon listing, not from our own testing.

## Specification

| Field | Value |
|---|---|
| Price | £65.99 |
| Customer rating | 4.5 out of 5 from 120 reviews |
| Breakaway (loosening) torque | 682 N.m |
| Tightening torque | 488 N.m |
| Model number | DCPB488DM |
| Power | 20V brushless motor, 4.0Ah battery and fast charger included |
| Speed control | 3 speeds up to 2,400 RPM, reverse auto-stop within 0.5 seconds |
| Head style | Box End (as listed) |

## Questions people ask

**Why does the name say 682 Nm when the specs say 488 Nm?**

They measure different things. The Dong Cheng bullet points give 682 N.m of breakaway torque, which is the force for undoing a seized nut, and 488 N.m of tightening force. The model number, DCPB488DM, carries the 488 figure, not the 682 in the product title.

**Does the Dong Cheng DCPB488DM come with a battery and charger?**

Yes. The included-components line lists 1 × impact wrench, 1 × 4.0Ah battery, 1 × charger, 5 impact sockets (17, 19, 21, 22, 24mm), 2 cylindrical pins, 2 O-rings, 1 belt hook and 1 storage box.

**How many batteries are in the box?**

The listing is inconsistent here. The included-components line and the set name ("1X 4.0Ah Battery") both specify one battery, while a bullet point refers to "4.0Ah large-capacity batteries" in the plural. The stated contents list gives one.

**What can this impact wrench actually undo?**

The listing claims 682 N.m of breakaway torque, and the accompanying review describes undoing a crankshaft pulley bolt torqued to 415 Nm and retightening it on the middle speed setting. Dong Cheng gives no separate figure for the highest of the three speeds.

**Does it have speed settings and a work light?**

The Dong Cheng listing describes 3 adjustable speeds running up to 2,400 RPM with a variable trigger, plus reverse auto-stop technology that halts rotation in 0.5 seconds once a nut is loose. A built-in LED work light is listed for engine bays and undercarriages.

**How heavy is it?**

The specification table lists the item weight as 2 kg. The listing also calls the tool compact and describes a balanced, anti-slip grip to reduce hand fatigue.