M18 FUEL High Torque 1⁄2” Impact Wrench with Pin Detent (Tool Only)
Battery answer
Every reviewed M18 pack powers SKU 2766-20 at full rated performance, with no battery-specific condition.
- Battery platform
- Milwaukee M18
- Packs required
- Not published by Milwaukee
- 9 work without conditions.
Battery requirement sources (1)
- Milwaukee Tool — manufacturer page, retrieved 2026-07-31
Compare the reviewed packs See tool specifications and sources
Milwaukee · Impact Wrenches · SKU 2766-20 · Milwaukee source
Compare the reviewed M18 packs
| Battery | Capacity | Energy | Power level | Answer |
|---|---|---|---|---|
| 48-11-1813 | 12 Ah | 216 Wh | PWR5 | Works |
| 48-11-1820 | 2 Ah | 36 Wh | not published | Works |
| 48-11-1828 | 3 Ah | 54 Wh | not published | Works |
| 48-11-1840 | 4 Ah | 72 Wh | not published | Works |
| 48-11-1850 | 5 Ah | 90 Wh | PWR2 | Works |
| 48-11-1850R | 5 Ah | 90 Wh | not published | Works |
| 48-11-1861 | 6 Ah | 108 Wh | PWR4 | Works |
| 48-11-1865 | 6 Ah | 108 Wh | PWR3 | Works |
| 48-11-1881 | 8 Ah | 144 Wh | PWR4 | Works |
Energy is capacity × nominal voltage — our arithmetic on Milwaukee’s figures, not a number they publish. It is the only honest way to compare packs across capacities. Power level is Milwaukee’s own PWR tier where they publish one.
Compatibility sources (1)
- Milwaukee Tool — manufacturer support, retrieved 2026-07-30“All M18 Batteries are compatible with M18 tools & chargers.”
Kit configurations
Ways Milwaukee sells this exact tool in a box. Contents are decomposed to manufacturer SKUs; non-SKU’d accessories — side handles, belt clips, cases — are omitted because they carry no compatibility meaning.
M18 FUEL High Torque 1⁄2” Impact Wrench with Pin Detent Kit (2766-22)
| Qty | Component | SKU |
|---|---|---|
| 1 | M18 FUEL High Torque 1⁄2” Impact Wrench with Pin Detent (Tool Only) | 2766-20 |
| 2 | M18 REDLITHIUM XC5.0 Extended Capacity Battery Pack | 48-11-1850 |
| 1 | M18 & M12 Multi-Voltage Charger | 48-59-1812 |
Battery capacity in the box: 10.0 Ah across 2 pack(s). This is the directly comparable capacity when weighing the kit against the bare tool plus packs.
Contents provenance: manufacturer claim; review completed 2026-07-31 by jon.
Contents sources for 2766-22 (1)
- Milwaukee Tool — manufacturer page, retrieved 2026-07-31
Tool specifications and manufacturer claims
Basic tool facts
| Brushless | Yes |
|---|---|
| Weight, bare tool | Not published for this exact SKU |
Specification sources (1)
- Milwaukee Tool — manufacturer page, retrieved 2026-07-31
Full specifications
As published by Milwaukee for SKU 2766-20, read 2026-07-31. Values are quoted in their units, not reformatted.
| Anvil Type | Detent Pin |
|---|---|
| Anvil Size | 1/2 in |
| Wrench Type | High Torque |
| Fastening Torque | 750 ft-lbs |
| Maximum Torque | 1100 ft/lbs |
| IPM | 0 - 2,400 IPM |
| Nut-Busting Torque | 1,100 ft-lbs |
| Tool Warranty | 5 Year (Tool), 3 Years (Battery) |
| Power Source | Cordless |
| Motor Type | POWERSTATE Brushless |
| Length | 8.1 in |
| Weight | 7.1 lb |
| Height | 10.75 in |
| Width | 3.15 in |
| LED Light | Yes |
| Fuel | Yes |
| Voltage | 18V |
| Brushless | Yes |
| Chuck Size | 1/2 inch |
| DRIVE CONTROL | 4-Mode w/ Bolt Removal Mode |
| Maximum RPM | 1800 rpm |
What Milwaukee says about it
- Most compact cordless High Torque Impact Wrench in its class at 8.1" in length
- REDLINK PLUS intelligence prevents damage to the tool and battery due to overloading or overheating
- Features a pin detent design for maximum socket retention
- Reduced user fatigue at only 7.1lbs with battery (battery not included)
- Bolt removal mode provides maximum nut-busting torque to break fastener free, then slows to 750rpm for more control when removing fasteners
- REDLITHIUM batteries deliver more work per charge and more work over the life of the battery
- Premium rubber overmold withstands corrosive materials and provides increased comfort when in use
- LED light to illuminate the work area
Manufacturer marketing copy, reproduced so you can judge it. We have not tested these claims.