A powerful 4-gallon sprayer for Milwaukee M18 owners, especially pros spraying harsh chemicals.
Amazon $399
A well-equipped 4.5-gallon sprayer with a big nozzle kit and an extendable stainless wand, for homeowners who spray many different products.
- 4.5 galTank
- 80 PSISpray power
- 12 V 8 Ah, includedPower source
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
- Nine nozzles and two wands, one of them stainless and extendable to 48 in
- Pressure dial from 20 to 80 PSI
- Battery and charger included
- Lead-acid battery is heavy
- Runtime per charge is not published on this listing
- Listing publishes no warranty
The My4Sons M4 family
Every My4Sons M4 model we rank, smallest first. Ratings compare each against its own type.
| Model | Tank | Rating | Price |
|---|---|---|---|
| My4Sons M4 Agitator | 4 gal | 3.7/5 | $299.99 |
| My4Sons M4 4.5 Gallon (this one) | 4.5 gal | 3.1/5 | $249.99 |
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | M41000 |
|---|---|
| Spraying | |
| Tank | 4.5 gal |
| Max pressure | 80 PSI |
| Nozzles included | 9 |
| Wand length | 48 in |
| Hose length | 60 in |
| Power | |
| Battery | 12 V 8 Ah, included |
| Features | |
| Adjustable pressure | Yes |
| Metal wand | Yes |
| Agitator | No |
| Gauge or control panel | No |
Alternatives in this type
The most powerful battery backpack sprayer here, for owners of EGO 56V tools who need reach into trees and tall hedges.
Amazon $296.10A 4-gallon bare tool for Makita 18V LXT owners who want a long-running sprayer on batteries they already have.
Amazon $384Compare
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