1. Important Safety Instructions
Always follow basic safety precautions when using this product to reduce the risk of fire, electric shock, and personal injury.
General Safety
- Read all instructions carefully before operating the sprayer.
- Keep the work area clean and well-lit. Cluttered or dark areas invite accidents.
- Do not operate the sprayer in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust.
- Keep children and bystanders away while operating the sprayer. Distractions can cause you to lose control.
- Wear appropriate personal protective equipment (PPE) such as safety glasses, gloves, and protective clothing when handling chemicals.
- Never spray towards people or animals.
- Do not use the sprayer for purposes other than its intended use.
Chemical Handling Safety
- Always follow the chemical manufacturer's instructions for mixing, handling, and disposal.
- Do not spray highly corrosive, flammable, or caustic chemicals.
- Ensure proper ventilation when mixing and spraying chemicals.
- Clean the sprayer thoroughly after each use, especially when switching between different types of chemicals.
Battery Safety
- Use only the charger specified by the manufacturer.
- Do not charge the battery in damp or wet conditions.
- Do not incinerate the battery, even if it is severely damaged or completely dead.
- Store the battery away from metal objects that could short the terminals.
- If battery fluid comes into contact with skin, wash immediately with soap and water. If it gets into eyes, flush with water for at least 15 minutes and seek medical attention.
2. Product Overview
The Sun Joe SJ-APS-1G is a 4V cordless chemical sprayer designed for efficient application of various liquids around your home and garden. It features a 1-gallon translucent tank, a 20-inch spray wand, and an adjustable nozzle.

Figure 2.1: Main components of the Sun Joe SJ-APS-1G sprayer, including the main unit, spray wand, charger, and shoulder strap.
Key Features:
- 4V Lithium-Ion Battery: Provides up to 4 hours of continuous runtime.
- 1-Gallon Translucent Tank: Allows for easy monitoring of liquid levels.
- 20-inch Spray Wand: Offers extended reach for targeted applications.
- Adjustable Nozzle: Easily switches between a precise jet stream and a wide fan spray.
- Onboard 3.4 fl. oz. Measuring Cup: Integrated for accurate chemical mixing.
- Lightweight Design: Enhances portability and ease of use.

Figure 2.2: Visual representation of the sprayer's adjustable nozzle, translucent tank, rechargeable battery, and onboard measuring cup.
3. Setup and Assembly
3.1 Charging the Battery
The sprayer comes with a rechargeable 4V lithium-ion battery. Before first use, fully charge the battery. Connect the charger to the sprayer's charging port and plug it into a standard electrical outlet. The charging indicator light will show the charging status. A full charge can provide up to 4 hours of continuous runtime.
3.2 Assembling the Spray Wand
- Carefully unpackage all components.
- Attach the 20-inch spray wand to the hose connection point on the sprayer unit. Ensure it is securely fastened to prevent leaks.
- Verify that the nozzle is securely attached to the end of the spray wand.

Figure 3.1: The 1-gallon tank and the 20-inch spray wand, highlighting their connection and use.
4. Operation
4.1 Filling the Tank
- Ensure the sprayer is turned off and the area is clear.
- Unscrew the tank cap.
- Using the onboard 3.4 fl. oz. measuring cup, accurately mix your desired chemical solution according to the manufacturer's instructions.
- Pour the mixed solution into the 1-gallon translucent tank. Do not overfill.
- Securely screw the tank cap back on.
4.2 Spraying
- Turn on the sprayer using the power switch.
- Aim the spray wand at the target area.
- Press the trigger on the spray wand to begin spraying. The sprayer is designed for continuous operation once the trigger is engaged.
4.3 Adjusting the Spray Pattern
The nozzle on the spray wand is adjustable. Twist the nozzle clockwise or counter-clockwise to change the spray pattern from a fine jet stream to a wide fan spray, depending on your application needs.

Figure 4.1: Demonstrates how twisting the nozzle adjusts the spray from a precise jet stream to a broad fan spray.
5. Maintenance
5.1 Cleaning the Sprayer
Proper cleaning after each use is crucial for the longevity and performance of your sprayer.
- Empty any remaining solution from the tank.
- Rinse the tank thoroughly with clean water.
- Fill the tank with clean water and spray it through the wand until the tank is empty. This flushes out any chemical residue from the pump and nozzle.
- Clean the exterior of the sprayer with a damp cloth. Do not immerse the unit in water.
5.2 Storage
Store the sprayer in a cool, dry place, away from direct sunlight and freezing temperatures. Ensure the tank is empty and clean before storage. Store the battery fully charged and recharge it periodically if storing for extended periods to maintain battery health.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Sprayer does not turn on. | Battery is not charged. Power switch is off. | Charge the battery fully. Ensure the power switch is in the "ON" position. |
| No spray or weak spray. | Tank is empty. Nozzle is clogged. Battery is low. Wand or hose is kinked. | Refill the tank. Clean the nozzle. Recharge the battery. Straighten the wand or hose. |
| Leaking from connections. | Connections are loose. O-rings are damaged. | Tighten all connections. Inspect and replace damaged O-rings if necessary. |
| Battery not charging. | Charger not properly connected. Faulty charger or battery. | Ensure charger is securely plugged into sprayer and outlet. Contact customer support if problem persists. |
7. Product Specifications
| Feature | Detail |
|---|---|
| Model | SJ-APS-1G |
| Battery Voltage | 4V Lithium-Ion |
| Motor Power | 3W |
| Tank Capacity | 1 Gallon (3.78 Liters) |
| Spray Wand Length | 20 inches (50.8 cm) |
| Hose Length | 40 inches (101.6 cm) |
| Continuous Runtime | Up to 4 hours |
| Spray Volume per Charge | Up to 15 gallons |
| Product Dimensions (L x W x H) | 18 x 9 x 12 inches (45.7 x 22.9 x 30.5 cm) |
| Item Weight | 3.45 pounds (1.57 kg) |
| UPC | 842470123472 |

Figure 7.1: Detailed dimensions and weight of the sprayer unit.
8. Warranty and Customer Support
Sun Joe products are backed by a manufacturer's warranty. For specific warranty details, product registration, or technical assistance, please visit the official Sun Joe website or contact their customer service department. Keep your purchase receipt as proof of purchase.
As noted in customer feedback, registering your product upon purchase can facilitate warranty claims and support processes.
For further assistance, you may visit the Sun Joe Store on Amazon.





