Rainmaker 18 Volt Lithium Ion Backpack Sprayer 4 Gallon

Adjustable-Flow Battery Spraying for Large Jobs, 18V 4 Gallon

A single fixed spray rate rarely fits every task on a large property — broad coverage over open ground calls for a different flow than careful spot treatment near sensitive plants. The Rainmaker 18 Volt Lithium Ion Backpack Sprayer adds a high and low speed flow rate switch on top of removing manual pumping entirely, so the operator can match output to the job without swapping equipment.

At 4 gallons with a removable 18V lithium-ion battery, this unit is built for large, sustained jobs where a corded or manual sprayer would mean constant stops.

Key Features & Benefits

• Removable, rechargeable 18V lithium-ion battery — runs for hours on a single charge with no manual pumping.
• High/low flow rate switch — adjust spray output to match different application needs.
• 3 interchangeable nozzles — further customize spray pattern for the task at hand.
• Lock-on trigger — supports continuous spraying without holding the trigger throughout.
• Padded shoulder straps, integrated filter, 4 ft hose — comfort and reach features for extended use.

Who Should Use This Sprayer

This sprayer fits growers and property managers running large, sustained spray jobs who want adjustable flow control without manual pumping. A spare battery and dedicated charging station are available separately for operations that need to keep spraying without waiting on a single battery to recharge.

About Rainmaker

Rainmaker's Lithium Ion Backpack Sprayer line uses a removable 18V battery system, supported by a separately available spare battery and charging station for continuous operation across long jobs.

Frequently Asked Questions

How long does the battery last per charge?

The removable lithium-ion battery provides hours of operation on a single charge, though exact run time varies with flow rate setting and spray duration.

What does the high/low flow switch do?

It lets you adjust the spray flow rate between two speeds, matching output to the task rather than spraying at one fixed rate for every job.

Can I keep a spare battery charged and ready?

Yes, the Rainmaker 18 Volt Lithium Ion Battery and Lithium Ion Battery Charging Station are both available separately, letting you swap in a charged spare during long jobs.

How many nozzles come with this sprayer?

It includes 3 interchangeable nozzles for different spray patterns.

How is this different from the Rainmaker 5 Gallon Battery Powered Sprayer?

This model uses a removable 18V lithium-ion battery and adds a high/low flow switch, and has a 4 gallon tank rather than 5 gallons; the two models use different battery systems and are not cross-compatible on chargers or batteries.