M18 FUEL Braking Die Grinder, Slide Switch
Battery answer
Every reviewed M18 pack powers SKU 2939-20 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 · Grinders · SKU 2939-20 · 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 | 2.89 lb |
Specification sources (1)
- Milwaukee Tool — manufacturer page, retrieved 2026-07-31
Full specifications
As published by Milwaukee for SKU 2939-20, read 2026-07-31. Values are quoted in their units, not reformatted.
| Height | 3.27 in |
|---|---|
| Length | 15.5 in |
| Width | 3.11 in |
| Branding | Badge: FUEL · Tool: FUEL |
| Brushless Motor | Yes |
| Color | Red |
| Cutting Width | 2 in |
| FUEL | Yes |
| Handle Type | Barrel Grip |
| Material | Metal |
| Motor Type | POWERSTATE Brushless |
| Number of Pieces Included | 1 |
| ONE-KEY Enabled | No |
| Warranty | 5 Year Limited Warranty |
What Milwaukee says about it
- Milwaukee POWERSTATE Brushless Motor provides more power, more run-time, and longer life
- REDLINK PLUS Intelligence: Most advanced system of electronics in the industry, enabling communication between batteries and tools, allowing for unmatched levels of performance, protection, and compatibility.
- M18 REDLITHIUM XC5.0 battery pack (not included) delivers up to 12" of weld bead removed
- Generating 11A Corded Power, The M18 FUEL Braking Die Grinder gives users the power they need to replace Corded Solutions
- RAPIDSTOP Brake stops cutting and sanding accessories in under 2 seconds.
- Spindle Lock, One Wrench Accessory Change
- Slide Switch, Designed to Reduce User Fatigue
- Fits all 1/4" Shank Accessories
- 27,000 RPM Brushless Motor is designed to deliver corded performance with 2" Accessory Sanding and Cutting Wheel Compatibility
- Compatible with all M18 Batteries
Manufacturer marketing copy, reproduced so you can judge it. We have not tested these claims.