M18 Brushless 1/4" Hex 3 Speed Impact Driver Bare Tool
Battery answer
Every reviewed M18 pack powers SKU 2851-20 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 Drivers · SKU 2851-20 · 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.”
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 2851-20, read 2026-07-31. Values are quoted in their units, not reformatted.
| Chuck Size | 1/4" Hex |
|---|---|
| Chuck Type | Hex Quick Change |
| Power Source | Cordless |
| Motor Type | Brushless |
| Length | 5.1" |
| Weight | 2 lbs |
| Height | 7.75 in |
| Width | 2.25" |
| RPM | 0-1700/0-2600/0-3400 |
| IPM | 0-1500/0-3400/0-4200 |
| Torque | 1600 in-lbs |
| LED | Yes |
| Voltage | 18V |
| Brushless | Yes |
| Maximum RPM | 3,400 |
| RPM Range | 0 - 3,400 |
What Milwaukee says about it
- Compact design: provides excellent balance and control, ideal for overhead applications or work in tight spaces
- IPM: 0-4,200
- RPM: 0-3,400
- Milwaukee brushless motor: optimized for efficiency, this motor delivers more run-time and longer life.
- REDLINK Intelligence: Advanced overload protection defends against abusive applications and monitors the temperature to prevent damage and ensure maximum tool & battery life.
- REDLITHIUM Battery: Superior pack construction, electronics, and performance deliver more work per charge and more work over pack life than any battery on the market
Manufacturer marketing copy, reproduced so you can judge it. We have not tested these claims.