M18 RADIUS Site Light
Battery answer
Every reviewed M18 pack powers SKU 2151-20 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 · Task Lighting · SKU 2151-20 · 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
| Weight, bare tool | 23.2 lb |
|---|
Specification sources (1)
- Milwaukee Tool — manufacturer page, retrieved 2026-07-31
Full specifications
As published by Milwaukee for SKU 2151-20, read 2026-07-31. Values are quoted in their units, not reformatted.
| Height | 29.5 in |
|---|---|
| Length | 14 in |
| Width | 15.75 in |
| Color | Red |
| Number of Pieces Included | 1 |
| ONE-KEY Enabled | No |
| PACKOUT Compatible | No |
| Runtime and Output by Mode | High-(XC8.0Ahx2) 2.5hr, 900 Lumens / Medium- 5hr, 4800 Lumens / Low- 10hr, 2500 Lumens |
| Switch Type | Push Button |
| Variable Speed | Yes |
| Warranty | 5 Year Tool Warranty, LED Limited Lifetime Warranty |
What Milwaukee says about it
- IP54 Rated: Water and Dust Resistant
- Plug-In and Daisy Chain
- 3 Brightness Modes for Optimal Run-Time and Output
- High Impact Polycarbonate Lens
- Low Battery Indicator
- LED Limited Lifetime Warranty: LEDs never need to be replaced
- Part of the M18 System, featuring 200+ solutions
Manufacturer marketing copy, reproduced so you can judge it. We have not tested these claims.