My4Sons M4 4.5 Gallon
A well-equipped 4.5-gallon sprayer with a big nozzle kit and an extendable stainless wand, for homeowners who spray many different products.
Amazon $249.99$249.99
The My4Sons M4 4.5 Gallon and the Solo 417-Li are evenly matched, rated 3.1 and 3.1. The My4Sons M4 4.5 Gallon leads on features and spray power.
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.
Solo 417-Li
#11 in 4 gallons and upFull review
A lithium 4.5-gallon sprayer from a long-time sprayer maker, for homeowners who want a long runtime without fuss.
Amazon $249.93$249.93
Which should you buy?
- Choose the My4Sons M4 4.5 Gallon for features (battery and charger included, adjustable pressure, 4 or more nozzles, metal wand vs battery and charger included, adjustable pressure) and spray power (up to 80 PSI vs up to 62 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 | My4Sons M4 4.5 Gallon | Solo 417-Li |
|---|---|---|
| Overall rating | 3.1/5 | 3.1/5 |
| Value 25% | 49 $55.55 per gallon of tank ($249.99, 4.5 gal) | 49 $55.54 per gallon of tank ($249.93, 4.5 gal) |
| Tank size 10% | 83 4.5 gal tank | 83 4.5 gal tank |
| Spray power 20% | 71 up to 80 PSI | 52 up to 62 PSI |
| Runtime or airflow 20% | 0 runtime not published, scored as zero | 39 3.7 hours per charge |
| Features 15% | 80 battery and charger included, adjustable pressure, 4 or more nozzles, metal wand | 50 battery and charger included, adjustable pressure |
| Warranty 10% | 0 warranty not published, scored as none | 0 1-year warranty |
Specifications
| My4Sons M4 4.5 Gallon | Solo 417-Li | |
|---|---|---|
| Spraying | ||
| Tank | 4.5 gal | 4.5 gal |
| Max pressure | 80 PSI | 62 PSI |
| Nozzles included | 9 | - |
| Wand length | 48 in | 28 in |
| Hose length | 60 in | 55 in |
| Power | ||
| Battery | 12 V 8 Ah, included | 11 V 7.8 Ah, included |
| Runtime per charge | - | 3.7 hours |
| Features | ||
| Adjustable pressure | Yes | Yes |
| Metal wand | Yes | No |
| Agitator | No | No |
| Gauge or control panel | No | No |
| Build | ||
| Warranty | - | 1 year |