Greenworks 80V 4 Gallon
A low-priced 4-gallon kit with a long runtime, for owners of Greenworks 80V tools.
Amazon $189.89$189.89
The Greenworks 80V 4 Gallon is the better battery backpack sprayer overall, rated 3.6 to 3.2. The Greenworks 80V 4 Gallon leads on value, runtime or airflow and features. The Milwaukee M18 Switch Tank wins on spray power. The Greenworks 80V 4 Gallon costs $209.11 less ($189.89 vs $399).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Milwaukee M18 Switch Tank
A powerful 4-gallon sprayer for Milwaukee M18 owners, especially pros spraying harsh chemicals.
Amazon $399$399
Which should you buy?
- Choose the Greenworks 80V 4 Gallon for value ($47.47 per gallon of tank ($189.89, 4 gal) vs $99.75 per gallon of tank ($399, 4 gal)), runtime or airflow (50 tanks per charge (200 gal) vs 20 tanks per charge (80 gal) with a battery sold separately) and features (battery and charger included, 4 or more nozzles vs adjustable pressure).
- Choose the Milwaukee M18 Switch Tank for spray power (up to 140 PSI vs up to 70 PSI).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 4 gallons and up battery backpack sprayer; a clear win is highlighted. How we rank explains each one.
| Factor weight | Greenworks 80V 4 Gallon | Milwaukee M18 Switch Tank |
|---|---|---|
| Overall rating | 3.6/5 | 3.2/5 |
| Value 25% | 59 $47.47 per gallon of tank ($189.89, 4 gal) | 12 $99.75 per gallon of tank ($399, 4 gal) |
| Tank size 10% | 67 4 gal tank | 67 4 gal tank |
| Spray power 20% | 61 up to 70 PSI | 100 up to 140 PSI |
| Runtime or airflow 20% | 100 50 tanks per charge (200 gal) | 60 20 tanks per charge (80 gal) with a battery sold separately |
| Features 15% | 45 battery and charger included, 4 or more nozzles | 20 adjustable pressure |
| Warranty 10% | 0 warranty not published, scored as none | 50 3-year warranty |
Specifications
| Greenworks 80V 4 Gallon | Milwaukee M18 Switch Tank | |
|---|---|---|
| Spraying | ||
| Tank | 4 gal | 4 gal |
| Max pressure | 70 PSI | 140 PSI |
| Max flow | - | 0.5 GPM |
| Nozzles included | 5 | - |
| Power | ||
| Battery | 80 V 2 Ah, included | 18 V, sold separately |
| Gallons per charge | 200 gal | 80 gal |
| Tanks per charge | 50 | 20 |
| Features | ||
| Adjustable pressure | - | Yes |
| Agitator | No | No |
| Gauge or control panel | No | No |
| Build | ||
| Warranty | - | 3 years |