M18 FUEL 4-1/2" / 5" Variable Speed Braking Grinder, Paddle Switch No-Lock
Battery answer
Every reviewed M18 pack powers SKU 2888-20 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 2888-20 · 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 | 3.2 lb |
Specification sources (1)
- Milwaukee Tool — manufacturer page, retrieved 2026-07-31
Full specifications
As published by Milwaukee for SKU 2888-20, read 2026-07-31. Values are quoted in their units, not reformatted.
| Arbor Hole Diameter | Yes |
|---|---|
| Height | 4.37 in |
| Length | 13.18 in |
| Width | 2.76 in |
| Branding | Badge: FUEL · Tool: FUEL |
| Brushless Motor | Yes |
| Colors | Black · Red |
| Cutting Width | 5 in |
| FUEL | Yes |
| Handle Type | Barrel Grip |
| Material | Metal |
| Motor Type | Brushless |
| Number of Batteries Included | 0 |
| Number of Batteries Required | 1 |
| Number of Pieces Included | 1 |
| ONE-KEY Enabled | No |
| Warranty | 5 Year Limited Warranty |
What Milwaukee says about it
- POWERSTATE Brushless Motor: Purposely built for the M18 FUEL 4-1/2" / 5" Variable Speed Braking Angle Grinder delivers 8,500 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.
- REDLITHIUM HIGH OUTPUT Battery Pack (Not Included): Provides 50% more power and runs 50% cooler versus standard REDLITHIUM Battery. Superior pack construction, electronics and performance deliver more work per charge and more work over pack lifespan than any battery on the market.
- Variable speed provides 5 speed setting between 3,500 RPM and 8,500 RPM for greater control.
- RAPIDSTOP Brake stops most wheels in less than 2 seconds.
- Paddle Switch Design for Increased Comfort and Ease-Of-Use when Operating in Various Positions
- Tool-Free Guard Adjustment for faster guard installations and adjustments
- Compatible with all M18 batteries
Manufacturer marketing copy, reproduced so you can judge it. We have not tested these claims.