M18 1/2" Impact Wrench with Pin Detent
Battery answer
Every reviewed M18 pack powers SKU 2659-20 at full rated performance, with no battery-specific condition.
- Battery platform
- Milwaukee M18
- Packs required
- 1 pack
- 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 2659-20 · 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 1/2" Impact Wrench Kit with Pin Detent (2659-22)
| Qty | Component | SKU |
|---|---|---|
| 1 | M18 1/2" Impact Wrench with Pin Detent | 2659-20 |
| 1 | M18 & M12 Multi-Voltage Charger | 48-59-1812 |
| 2 | M18 REDLITHIUM XC Extended Capacity Battery | 48-11-1828 |
Battery capacity in the box: 6.0 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 2659-22 (1)
- Milwaukee Tool — manufacturer page, retrieved 2026-07-31
Tool specifications and manufacturer claims
Basic tool facts
| Brushless | No |
|---|---|
| Weight, bare tool | 4.1 lb |
Specification sources (1)
- Milwaukee Tool — manufacturer page, retrieved 2026-07-31
Full specifications
As published by Milwaukee for SKU 2659-20, read 2026-07-31. Values are quoted in their units, not reformatted.
| Anvil Size | 1/2 in |
|---|---|
| Anvil Type | Detent Pin |
| Height | 9 in |
| Length | 5.75 in |
| Width | 3.4 in |
| Branding | Badge: Not Applicable · Tool: Brushed |
| Brushless Motor | No |
| Chuck Size | Not Applicable in |
| Chuck Type | Not Applicable |
| Colors | Black · Red |
| FUEL | No |
| IPM Range | 0 - 3,350 IPM |
| Material | Metal |
| Maximum Torque | 183 ft-lbs |
| Motor Type | Brushed |
| Number of Batteries Required | 1 |
| Number of Pieces Included | 1 |
| ONE-KEY Enabled | No |
| RPM Range | 0 - 2,450 RPM |
| Warranty | 5 Year Limited Warranty |
What Milwaukee says about it
- 1/2" Anvil with Pin Detent
- Milwaukee 4-Pole Frameless Motor: Features a robust design for longer life, more power and more runtime than any brushed competitor
- Milwaukee designeded Impact Mechanism: Delivers maximum power and application speed for greater efficiency on the job
- REDLINK Intelligence: Provides optimized performance and overload protection using total system communication between tool, battery and charger
Manufacturer marketing copy, reproduced so you can judge it. We have not tested these claims.