Important Safety Instructions
Read all instructions carefully before operating the lawn mower. Failure to follow these instructions may result in serious injury or property damage. Keep this manual for future reference.
- Always wear appropriate personal protective equipment, including eye protection and sturdy footwear, when operating the mower.
- Ensure the safety key is removed when the mower is not in use, during cleaning, or when performing maintenance.
- Keep hands and feet away from the cutting blade.
- Do not operate the mower in wet grass or rain.
- Clear the mowing area of any objects that could be thrown by the blade.
- Keep bystanders, especially children and pets, at a safe distance from the mowing area.
- Never attempt to adjust the cutting height while the motor is running.
- Inspect the mower for damage before each use. Do not operate if damaged.
Product Overview
The PowerSmart 80V Battery Lawn Mower (Model PS76821) is a cordless electric push mower designed for efficient lawn care. It features a 21-inch cutting deck and offers 3-in-1 functionality for mulching, side discharge, and rear bagging.

Figure 1: Overview of the PowerSmart 80V Lawn Mower, highlighting key components such as the mowing trigger, start switch, light switch, safety-key insert, safety double-start, folding handle, side discharge chute, 5-position height adjustment, and 21-inch cutting blade.

Figure 2: Illustration of the 3-in-1 deck versatility, showing options for rear bagging, mulching, and side discharge.

Figure 3: The mower is equipped with a brushless motor, designed for efficient operation and extended product life.

Figure 4: The mower includes an integrated LED light for improved visibility during operation in low-light conditions.

Figure 5: The adjustable handle design allows for quick folding and extension, facilitating compact storage.
Product Video Overview
Video 1: An overview of the PowerSmart 80V Lawn Mower (PS76821), demonstrating its features and general use.
Assembly
1. Handle Assembly
The mower features a quick-fold design, requiring minimal assembly. Extend the handle to its full operating position. Ensure the handle locking clamps are securely closed to prevent movement during operation.

Figure 6: The motor will not start unless the handle is locked into the operating position, the upper handle is fully extended, and both handle locking clamps are securely closed.
2. Battery Insertion
Open the battery compartment cover. Align the 80V battery with the battery slot and push it firmly until it clicks into place. Close the battery compartment cover securely.

Figure 7: The battery compartment showing the 80V battery and charger. Ensure the battery is fully charged before insertion.
3. Grass Bag / Side Discharge Chute Installation
Depending on your desired mowing method, install the grass collection bag or the side discharge chute. Refer to the diagrams for proper attachment.
Operation
1. Battery Charging
Before first use, fully charge the 80V 6.0Ah battery using the included charger. The charger indicator lights will show the charging status. A full charge provides up to 50 minutes of run time, capable of cutting over 1/2 acre of grass.
2. Adjusting Cutting Height
The mower offers a single-lever, 5-position height adjustment, ranging from 1.18 inches to 3 inches. To adjust, pull the height adjustment lever outwards and move it to the desired position. Ensure all wheels are set to the same height.

Figure 8: The mower features 5 adjustable cutting height settings, from 1.18 inches to 3.0 inches, suitable for various grass types and conditions.
3. Starting the Mower
To start the mower, ensure the battery is inserted and the safety key is in place. Follow these steps:
- Long press the start button until the green light illuminates.
- Press and hold the lawn mower wrench (mowing trigger) while simultaneously holding the start button.
- Release the start button once the blade begins to turn. Continue holding the mowing trigger to operate the mower.

Figure 9: Visual guide for the safety start steps, illustrating the sequence of pressing the start button and mowing trigger.
4. Stopping the Mower
Release the mowing trigger to stop the mower. The blade will cease rotation within a few seconds. Always remove the safety key when finished mowing or when leaving the mower unattended.
5. Mowing Tips
- For best results, mow dry grass.
- Avoid cutting more than one-third of the grass blade length at a time.
- Overlap cutting paths slightly to ensure an even cut.
- Use the LED light for improved visibility in shaded areas or during early morning/late evening mowing.
6. 3-in-1 Functionality
The mower supports three cutting modes:
- Rear Bagging: Attach the grass collection bag to collect clippings.
- Mulching: Remove the grass bag and side discharge chute. The mower will finely cut and redistribute clippings back onto the lawn.
- Side Discharge: Attach the side discharge chute to direct clippings away from the mower.
Operation Video
Video 2: A detailed operation video for the PowerSmart 80V Lawn Mower (PS76821), demonstrating starting, stopping, and general use.
Maintenance
Regular maintenance ensures optimal performance and extends the life of your lawn mower. Always remove the safety key and battery before performing any maintenance.
1. Cleaning
- After each use, clean the underside of the mower deck to prevent grass buildup, which can affect cutting performance.
- Wipe down the exterior of the mower with a damp cloth. Do not use water jets or high-pressure washers directly on electrical components.
2. Blade Care
- Periodically inspect the cutting blade for sharpness and damage. A dull or damaged blade can lead to poor cutting quality and increased battery drain.
- If the blade is dull, have it sharpened by a qualified service technician. If the blade is bent or cracked, it must be replaced.
- When replacing the blade, ensure the replacement blade is the correct model for PS76821.
3. Battery Storage
- Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
- For long-term storage, ensure the battery is partially charged (around 50%) to maintain its health.
Troubleshooting
This section addresses common issues you might encounter with your PowerSmart 80V Lawn Mower.
| Problem | Possible Cause | Solution |
|---|---|---|
| Mower does not start |
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| Short run time |
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| Mower stalls frequently |
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| Uneven cut |
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Specifications
| Feature | Detail |
|---|---|
| Model Number | PS76821 |
| Brand | PowerSmart |
| Power Source | Battery Powered (80V) |
| Battery Included | 6.0Ah 80V Battery |
| Charger Included | Yes |
| Cutting Width | 21 Inches |
| Cutting Height Adjustment | 5 Positions (1.18" to 3") |
| Mowing Functions | 3-in-1 (Mulching, Side Discharge, Rear Bagging) |
| Deck Material | Alloy Steel |
| Product Dimensions (D x W x H) | 37.4" x 21" x 63" |
| Approximate Run Time | Up to 50 minutes (on a single charge) |
Warranty Information
The PowerSmart 80V Battery Lawn Mower (Model PS76821) comes with a 2-year warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. For specific terms and conditions, refer to the warranty card included with your product or contact customer support.
Customer Support
For assistance with assembly, operation, maintenance, or troubleshooting, please contact PowerSmart Customer Support. Contact details can typically be found on the product packaging, the official PowerSmart website, or through your retailer's customer service portal.