M18 FUEL 7-1/4” Circular Saw (Tool Only)
Battery answer
Every reviewed M18 pack powers SKU 2731-20 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 · Saws and Cutters · SKU 2731-20 · 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.”
Kit configurations
Ways Milwaukee sells this exact tool in a box. Contents are decomposed to manufacturer SKUs; non-SKU’d accessories — side handles, belt clips, cases — are omitted because they carry no compatibility meaning.
M18 FUEL 7-1/4” Circular Saw Kit (2731-21)
| Qty | Component | SKU |
|---|---|---|
| 1 | M18 FUEL 7-1/4” Circular Saw (Tool Only) | 2731-20 |
| 1 | M18 & M12 Multi-Voltage Charger | 48-59-1812 |
| 1 | M18 REDLITHIUM XC5.0 Extended Capacity Battery Pack | 48-11-1850 |
Battery capacity in the box: 5.0 Ah across 1 pack(s). This is the directly comparable capacity when weighing the kit against the bare tool plus packs.
Contents provenance: manufacturer claim; review completed 2026-07-31 by jon.
Contents sources for 2731-21 (1)
- Milwaukee Tool — manufacturer page, retrieved 2026-07-31
M18 FUEL 7-1/4” Circular Saw Kit (2731-22)
| Qty | Component | SKU |
|---|---|---|
| 1 | M18 FUEL 7-1/4” Circular Saw (Tool Only) | 2731-20 |
| 1 | M18 & M12 Multi-Voltage Charger | 48-59-1812 |
| 2 | M18 REDLITHIUM XC5.0 Extended Capacity Battery Pack | 48-11-1850 |
Battery capacity in the box: 10.0 Ah across 2 pack(s). This is the directly comparable capacity when weighing the kit against the bare tool plus packs.
Contents provenance: manufacturer claim; review completed 2026-07-31 by jon.
Contents sources for 2731-22 (1)
- Milwaukee Tool — manufacturer page, retrieved 2026-07-31
Tool specifications and manufacturer claims
Basic tool facts
| 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 2731-20, read 2026-07-31. Values are quoted in their units, not reformatted.
| Tool Warranty | 5 Years |
|---|---|
| Power Source | Cordless |
| Length | 13" |
| Weight | 7.5 lbs |
| Warranty | 5 Year Limited Warranty |
| Arbor Size | 5/8" |
| No Load RPM | 5,000 |
| Blade Guard | Magnesium |
| Shoe | Magnesium |
| Maximum Bevel Capacity | 50 degrees |
| Battery Warranty | 3 Year |
| Fuel | Yes |
| Voltage | 18V |
What Milwaukee says about it
- POWERSTATE Brushless Motor: Increased cutting speed and power through the toughest applications
- REDLINK PLUS Intelligence: Provides optimized performance and overload protection using total system communication between tool, battery and charger
- REDLITHIUM XC5.0 Battery Pack: Provides superior pack construction, more work per charge and more work over the life of the pack than competitive batteries
- 2-1/2" Cut Depth for greater range of applications
- Integrated Rafter Hook for easy storage between uses
- LED Light for great cutline visibility in low light situations
Manufacturer marketing copy, reproduced so you can judge it. We have not tested these claims.