M18 FUEL 21mm Random Orbital Polisher
Battery answer
Every reviewed M18 pack powers SKU 2685-20 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 · Sanders and Polishers · SKU 2685-20 · 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 | 5.61 lb |
Specification sources (1)
- Milwaukee Tool — manufacturer page, retrieved 2026-07-31
Full specifications
As published by Milwaukee for SKU 2685-20, read 2026-07-31. Values are quoted in their units, not reformatted.
| Height | 5.32 in |
|---|---|
| Length | 17.28 in |
| Width | 2.75 in |
| Branding | Badge: FUEL · Tool: FUEL |
| Brushless Motor | Yes |
| FUEL | Yes |
| Material | Metal |
| Motor Type | POWERSTATE Brushless |
| Number of Pieces Included | 1 |
| Warranty | 3 Year Limited Warranty |
What Milwaukee says about it
- Total control in polishing and heavy correction applications
- 6 in. pad capacity
- 8-speed dial with RPM's ranging from 2,400-4,500 RPM
- Premium electronic motor feedback maintains speed and power under load
- Lock-on switch reduces user fatigue during extended use
- Variable speed trigger for greater precision and total user control
- Optimized center of balance
- Ergonomic design for greater user comfort and portability
- 2.17 in. of battery clearance
- Compatible with all M18 REDLITHIUM batteries and chargers
Manufacturer marketing copy, reproduced so you can judge it. We have not tested these claims.