M18 FUEL 4-1/2"-7" Variable Speed Braking Grinder, Paddle Switch w/ ONE-KEY
Battery answer
Every reviewed M18 pack powers SKU 3674-20 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 · Grinders · SKU 3674-20 · 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 | 6 lb |
Specification sources (1)
- Milwaukee Tool — manufacturer page, retrieved 2026-07-31
Full specifications
As published by Milwaukee for SKU 3674-20, read 2026-07-31. Values are quoted in their units, not reformatted.
| Height | 4.5 in |
|---|---|
| Length | 15 in |
| Width | 3 in |
| Branding | Badge: FUEL · Tool: FUEL |
| Brushless Motor | Yes |
| Colors | Red · Black |
| FUEL | Yes |
| Handle Type | Barrel Grip |
| Materials | Glass Filled Nylon · Aluminum |
| Motor Type | POWERSTATE Brushless |
| Number of Batteries Included | 0 |
| Number of Batteries Required | 1 |
| Number of Pieces Included | 1 |
| ONE-KEY Enabled | Yes |
| Warranty | 5 Year Limited Warranty |
What Milwaukee says about it
- POWERSTATE Brushless Motor: Purposely built for the M18 FUEL 7" Angle Grinder delivers 8,400 RPM to provide the power to complete the toughest grinding and cutting applications.
- 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.
- RAPIDSTOP Brake stops all accessories in 3 seconds or less
- M18 REDLITHIUM FORGE XC8.0 Battery Pack delivers you HIGH OUTPUT HD12.0 power in a smaller size and the longest life vs. REDLITHIUM batteries.
- Compact, 7" angle grinder fits in tight spaces while handling tough tasks
- Variable speed provides 4 speed settings between 5,000-8,400 RPM
- Overload Protection: Maximizes motor life
- Electronic clutch for kickback protection
- ONE-KEY Compatible: Ability to customize, track and manage tools for increased productivity and investment protection
- Anti-Vibration Side Handle: Reduces vibration, increasing user comfort during extended use
- 5/8"-11 Spindle for use with common grinding accessories
- Compatible with all M18 Batteries
Manufacturer marketing copy, reproduced so you can judge it. We have not tested these claims.