Powersmart DB2821 User manual

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INSTRUCTION MANUAL
EN 21"80V Cordless Lawn Mower
FR 21" 80V Une tondeuse à gazon sans fil
ES 21" 80V Cortacésped inalámbrico
Model # DB2821
Have product questions or need technical support? Please feel free to contact us!
Website: www.powersmartusa.com
Toll free: 1-800-791-9458, 1-888-293-0024 (Mon-Fri 9-5 EST)
Email: [e-mail]
[e-mail]
Website

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EN
CONTENTS
Contents................................................................................................................. 3
Techinical data........................................................................................................ 3
Safety information .................................................................................................. 4
Symbols ............................................................................................................... 10
Know your lawn mower......................................................................................... 12
Assembly.............................................................................................................. 13
Operation ............................................................................................................. 17
Maintenance......................................................................................................... 22
Service............................................................................................................23
Environmentally safe battery disposal................................................................... 24
Troubleshooting.................................................................................................... 25
Exploded View ..................................................................................................... 26
Parts List....................................................................................................................27
Warranty............................................................................................................... 29
TECHNICAL DATA
21" 80V CORDLESS LAWN MOWER Model # DB2821
Battery type: 80V Lithium-ion
Charger time: 90mins
No-load speed: 3000 RPM
Cutting width: 21 inch
Height adjustments: 6 Position
Grass catcher capacity: 15.8 Gallon
Wheel: Front: 7 inch / Rear: 8 inch
Package dimensions (L x W x H): 32.9 x 22.6 x 16.5 inches
Weight: 67.2lbs

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SAFETY INFORMATION
GENERAL SAFETY RULES
WARNING: when using electric lawn mowers, basic safety precautions should always
be followed to reduce the risk of fire, electric shock, and personal injury, including the
following:
READ ALL INSTRUCTIONS CAREFULLY
WARNING:This symbol indicates important safety instructions. If these instructions
are not followed, it could endanger the personal safety and/or property of the operator
and others. Read and understand all instructions in this manual before attempting to
operate the mower. Failure to comply with these instructions may result in personal
injury.
DANGER
This mower was built to be operated according to the rules for safe operation that are
contained in this manual. As with any type of power equipment, carelessness or error
on the part of the operator can result in serious injury. This mower is capable of
amputating body parts and throwing objects. Failure to observe the following safety
rules could result in serious injury or death.
WARNING: Basic safety precautions should always be followed when using electric
lawn mowers, in order to
reduce the risk of fire, electric shock, and personal injury.
WARNING: Use of this mower should be restricted to individuals who have read and
understoood and will follow the warnings and instructions that are printed in this
manual and on the mower.
• Carefully read all instructions on the mower and in the manual before attempting to
assemble and operate the mower. Keep this manual in a safe place for future
reference, and consult it regularly.
• Become familiar with all controls and their proper operation. Know how to stop the
mower and how to disengage the power in an emergency.
• In order to avoid contact with the blade or injury caused by a thrown object, stay in
the operating zone behind the handles, and keep children and bystanders at least
100’ (30 m) away from the mower while it is in operation. Stop the motor
immediately if someone enters the mowing area.
• Thoroughly inspect the area where the mower is to be used. Remove all stones,

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sticks, wire, bones, toys, and other objects that could be tripped over or thrown by
the blade. Thrown objects can cause serious personal injury.
• Plan your mowing pattern in such a way as to avoid discharging material toward
roads, sidewalks, bystanders, etc. Do not discharge material against a wall or
obstruction. Doing so may cause the discharged material to ricochet back toward the
operator.
• Always wear proper eye protection that complies with ANSI Z87.1 in order to
protect your eyes while operating or performing any adjustment or repair. Thrown
objects that ricochet can cause serious eye injury.
• Always wear a face mask or a dust mask when operating the mower in a dusty
environment.
• Dress properly. Do not wear loose clothing or jewelry that can get caught in moving
parts. The wearing of protective gloves and safety footwear is recommended.
• Many injuries occur as a result of the mower being pulled over the operator’s foot
during a fall caused by slipping or tripping. Do not operate this mower in bare feet,
or while wearing sandals or lightweight (e.g., canvas) shoes. Do not hold on to the
mower if you are falling. Release the handle immediately.
• Never pull the mower back toward you while you are walking. If you must back the
mower away from a wall or an obstruction, first look down and behind in order to
avoid tripping, and then follow these steps:
• Step back from the mower in order to fully extend your arms.
• Be sure that you are well balanced.
• Pull the mower back slowly.
• Do not use the mower for any job except that for which it is intended. Do not force the
mower.
• Do not operate the mower while under the influence of alcohol or drugs.
• Stay Alert: Do not operate the mower when you are tired. Pay attention to what you
are doing. Use common sense.
• Do not put hands or feet near rotating parts or under the cutting deck. Contact with
the blade can amputate hands and feet.
• Do not attempt to adjust the wheels or the cutting height while the motor is running.
• Avoid dangerous environments. Do not operate the mower in the rain or in wet or
damp grass.
• Mow only in daylight or in good artificial light. Do not rush a mowing job.
• Stop the blade when crossing gravel driveways, walkways, or roads.
• If the mower starts to vibrate excessively, stop the motor , remove the battery and
check for the cause immediately. Vibration is generally a sign that the mower is not
working properly or needs repair.

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• Stop the motor and wait until the blade comes to a complete stop before removing
the grass catcher or unclogging the chute. The cutting blade will continue to rotate
for a few seconds after the motor is shut off. Do not place any part of your body in
the blade area until you are sure that the blade has stopped rotating.
• Never operate mower without a proper trail shield, discharge cover, grass catcher,
switch control, or other safety device in place and in working order. Do not operate
the mower with damaged safety devices. Doing so can result in injury.
• Don’t force lawn mower. It will do the job better and safer at the rate for which it was
designed.
• Store idle lawn mower indoors. When not in use, lawn mower should be stored in an
indoor dry and look-up place, out of reach of children.
• Maintain lawn mower. Keep cutting edges sharp and clean to ensure the best
performance and safety.
• If lawn mower strikes a foreign objects follow these steps:
• Stop lawn mower, release the switch.
• Remove the battery.
• Inspect for damage.
• Repair any damage before restarting and operating the lawn mower.
• Do not charge lawn mower in the rain or in a wet location.
• Remove or disconnect battery before servicing, cleaning or removing material from
lawn mower.
• Inspect lawn mower cord periodically and if damaged, have it repaired by an
authorized service facility.
• Use identical replacement blades only.
• Store indoors, and do not expose to rain or water, avoid direct sunshine.
CHILD SAFETY
Tragic accidents can occur if the operator is not aware of the presence of children.
• Keep children out of the mowing area and under the watchful care of a responsible
adult.
• Do not allow children under the age of 14 to operate this mower. Children who are
14 years of age and older must read and understand the operating instructions
and safety rules in this manual, and must be trained and supervised by a parent.
• Stay alert, and turn the mower off if a child or any other person enters the mowing
area.
• Look behind and down for small children before and while moving backwards.
• Use extreme care when approaching blind corners, doorways, shrubs, trees, or other
objects that may obscure your view of a child who may run into the path of the
mower.

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BATTERY & CHARGER
CAUTION:USE ONLY POWERSMART APPROVED REPLACEMENT BATTERIES,
OTHER BATTERIES MAY CAUSE INJURY OR DAMAGE TO THE MOWER. Use
with POWERSMART 80V battery.
BATTERY SAFETY RULES
• Battery tools do not have to be plugged into an electrical outlet; therefore, they are
always in operating condition. Be aware of possible hazards when not using your
battery tool or when changing accessories. Following this rule will reduce the risk of
electric shock, fire, or serious personal injury.
• Do not place battery tools or their batteries near fire or heat. This will reduce the
risk of explosion and injury.
• Do not crush, drop or damage battery pack. Do not use a battery pack or charger
that has been dropped or received a sharp blow. A damaged battery is subject to
explosion. Properly dispose of a dropped or damaged battery immediately.
• Batteries can explode in the presence of a source of ignition, such as a pilot light. To
reduce the risk of serious personal injury, never use any cordless product in the
presence of open flame. An exploded battery can propel debris and chemicals. If
exposed, flush with water immediately. Do not charge battery tool in a damp or wet
location. Following this rule will reduce the risk of electric shock.
• For best results, your battery tool should be charged in a location where the
temperature is more than 45°F but less than 104°F. To reduce the risk of serious
personal injury, do not store outside or in vehicles.
• Under extreme usage or temperature conditions, battery leakage may occur. If liquid
comes in contact with your skin, wash immediately with soap and water. If liquid gets
into your eyes, flush them with clean water for at least 10 minutes, then seek
immediate medical attention. Following this rule will reduce the risk of serious
personal injury.
• When battery pack is not in use, keep it away from other metal objects like: paper
clips, coins, keys, nails, screws, or other small metal objects that can make a
connection from one terminal to another. Shorting the battery terminals together may
cause sparks, burns, or a fire.
• Always remove battery pack from your tool when you are assembling parts,
making adjustments, cleaning, or when not in use. Removing battery pack will
prevent accidental starting that could cause serious personal injury.
• Always remove battery pack before storing the device. When battery becomes fully
charged, unplug the charger from the power supply and remove the battery pack
from the charger.
• Always wear eye protection with side shields marked to comply with ANSI Z87.1,
along with hearing protection. Failure to do so could result in objects being thrown
into your eyes and other possible serious injuries.

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• Keep battery pack dry, clean, and free from oil and grease. Always use a clean cloth
when cleaning. Never use brake fluids, gasoline, petroleum-based products, or any
solvents to clean battery pack.
• Do not open or mutilate the battery. Released electrolyte is corrosive and
may cause damage to the eyes or skin. It may be toxic if swallowed.
PROPER CARE FOR BATTERY
Off-season storage
To obtain the longest possible battery life, we suggest the following:
• Remove the battery pack from the charger once it is fully charged and ready
for use. For battery pack storage longer than 30 days:
• Store the battery pack where the temperature is below 80°F and away from moisture.
• Store battery packs in a 30%-50% charged condition.
• Every two months of storage, charge the pack as normal.
CHARGER SAFETY RULES
• Charge the mower battery in a dry area that is protected from the weather. Do not
expose the mower or the charger to rain. Do not charge the battery in a wet location.
Operate the battery charger in temperatures between 45° and 104°F. In order to
reduce the risk of electric shock, use only the charger that is provided by the
manufacturer to charge the battery.
• DO NOT ABUSE THE CHARGE CORD. Never carry the charger by the cord. Do
not disconnect the charger from the outlet or from the mower by pulling the charger
cord.
• Do not use a damaged charger. Replace the charger cords or the charger
immediately.
• Keep the mower and the charger away from water, heat sources (radiators, heaters,
stoves,etc.), flames, and chemicals.
• Make sure the battery pack is secured in the charger before beginning operation.
• The battery pack will become slightly warm to the touch while charging. This is
normal and does not indicate a problem.
• Do not place the charger and battery pack in an area of extreme heat or cold. They
will work best at normal room temperature.
• When batteries become fully charged, unplug the charger from the power supply and
remove the battery pack.
WARNING: When transporting or servicing unit, always remove the battery.

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WARNING: Some dust created by power sanding, sawing, grinding, drilling and
other construction activities contains chemicals known to the state of California to
cause cancer, birth defects or other reproductive harm. Some examples of these
chemicals are:
• Lead from lead-based paints,
• Crystalline silica from bricks and cement and other masonry products, and
• Arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you do this type of
work. To reduce your exposure to these chemical: work in a well ventilated area, and
work with approved safety equipment, such as those dust masks that are specially
designed to filter out microscopic particles.

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SYMBOLS
Some of the following symbols may be used on this product. Please study them and learn their
meaning. Proper interpretation of these symbols will allow you to operate the product better and safer.
SYMBOL
NAME
DESIGNATIONS
V
Volts
Voltage
A
Amperes
Current
Hz
Hertz
Frequency (cycles per second)
W
Watts
Power
min
Minutes
Time
Direct Current Type or a characteristic of current
no
No Load Speed
Rational speed, at no load
/min Per Minute Revolutions, strokes, surface speed,
orbits etc., per minute
Safety Alert Indicates a potential personal injury hazard.
Wet Conditions Alert Cutting/dismemberment hazard of hand.
Keep hands away from the rotating blade.
WARNING To reduce the risk of injury, user must
read instruction manual.
Eye Protection Wear eye and hearing protection. For
protection against injury, wear ear
defenders and safety goggles.
Keep Hands and Feet
Away
Keep hands and feet away from blade and
cutting area.
No Reach
Severing of toes or fingers by rotary mower
blade.
Slip on slope hazard Slip on slope hazard – Use extra caution
when mowing on slopes to prevent slip and
fall accidents.
Keep Bystanders Away Keep all bystanders at least 100 ft. away.
CAUTION Objects picked up and thrown by the rotating
blade can cause severe injury.

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SYMBOL
NAME
DESCRIPTIONS
DANGER Indicates an imminently hazardous situation,
which, if not avoided, will result in death or serious
injury.
Wet
Conditions
Alert
Do not expose to rain or use in damp locations
WARNING Indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury.
CAUTION Indicates a potentially hazardous situation, which, if not
avoided, may result in minor or moderate injury.
ENVIRONMENTAL PROTECTION
Waste electrical products should not be disposed of with household waste.
Please recycle where facilities exist. Check with your local authority or
retailer for recycling advice.
The battery contains material which is hazardous to you and the
environment. It must be removed and disposed of separately at a facility that accepts
lithium-ion batteries.
SERVICE
Servicing requires extreme care and knowledge and should be performed only by a
qualified service technician. For service we suggest you return the product to your
nearest AUTHORIZED SERVICE CENTER for repair. When servicing, use only
identical replacement parts.
WARNING: To avoid serious personal injury, do not attempt to use this product until
you have read this Owner's Manual thoroughly and understand it completely. If you do
not understand the warnings and instructions in this Owner's Manual, do not use this
product. Call the Toll-free Helpline (1- 800-791-9458) for assistance.
WARNING: The operation of any power tool can result in foreign objects being thrown
into your eyes, which can result in severe eye damage. Before beginning power tool
operation, always wear safety goggles or safety glasses with side shields and when
needed, a full face shield. We recommend Wide Vision Safety Mask for use over
eyeglasses or standard safety glasses with side shields. Always use eye protection
which is marked to comply with ANSI Z87.1.

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KNOW YOUR LAWN MOWER
Read this operator's manual and safety rules before operating your lawn mower.
Compare the illustration in Figure 1 to your lawn mower in order to familiarize yourself
with the location of various controls and adjustments. Save this manual for future
reference.
Figure 1
1
Switch button
7
Front wheel
2
Start/stop control
8
Side discharge chute
3
Upper tube
9
Cutting height adjustment
lever
4
Lower tube
10
Grass collection bag
5
6
Rear discharge cover
Battery box
11
12
Rear wheel
Foldable handle
2
3
4
5
6
1
7
8
9
9
10
12
11

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ASSEMBLY INSTRUCTIONS
UNPACKING
• Carefully remove the product and any accessories from the box. Make sure that all
items listed in the packing list are included.
• Inspect the product carefully to make sure no breakage or damage occurred during
shipping.
• Do not discard the packing material until you have carefully inspected and
satisfactorily operated the product.
• If any parts are damaged or missing, please call 1-800-791-9458 for assistance.
PACKING LIST
• Lawn mower
• Side discharge
• Grass catcher
bag
• Battery pack
• Charger
• Owner’s manual
• 2 Cable clips
WARNING: If any parts are damaged or missing do not operate this product until the
parts are replaced. Using a product with damaged or missing parts could result in
serious personal injury.
WARNING: Do not attempt to modify this product or create accessories not
recommended for use with this product. Any such alteration or modification is misuse
and could result in a hazardous condition leading to possible serious personal injury.
WARNING: Do not insert the battery until assembly is complete and you are ready to
mow. Failure to comply could result in accidental starting and possible serious personal
injury.
WARNING: To prevent accidental starting that could cause serious personal injury,
always remove the battery pack from the product when assembling parts.
WARNING: Never operate the mower without the proper safety devices in place and
working. Never operate the mower with damaged safety devices. Operation of this
product with damaged or missing parts could result in serious personal injury.

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ATTACH LOWER & UPPER HANDLE(See Figure 2)
1. Take out the folded mower from the outer box.
2. Lock the foldable handle between the upper tube and lower tube.
3. Turn the lower tube to an angle that matches the base and tighten the knobs.
Figure 2
4. Lock the cable to the lower tube using cable clip.
Figure 3

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SIDE DISCHARGE CHUTE
To convert mower for side discharge, the grass catcher has been removed and that the
rear discharge door is closed.
1.Lift the spring-loaded discharge cover located on the side of the mower.
2.Slide two hooks of the side discharge chute under the hinge pin and lower the spring on
the side discharge cover.
Caution: Do not attempt to remove the permanently mounted spring loaded side
discharge cover at any time.
GRASS CATCHER
Attach grass catcher
1. Lift mower rear discharge door.
2. Place grass catcher into the slots in the handle brackets.
3. Release the rear discharge door so that it rests on the grass catcher.
Figure 4
Figure 5

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TO INSTALL BATTERY PACK (See Figure 6)
• Lift and hold up the battery door.
• Place the battery pack on the mower. Align guided ribs on battery pack with grooves
in the product’s battery port.
• Make sure the latch on bottom of the battery pack snaps in place and that battery
pack is fully seated and secure in the product before beginning operation.
• Insert the safety key.
• If the machine is not going to be used immediately, do not insert the safety key.
• Close the door.
Figure 6
TO REMOVE BATTERY PACK (See Figure 6)
• Release the power lever to stop the product.
• Remove the safety key.
• Press and hold the battery latch button at the bottom of the battery pack.
• Remove battery pack from the product.
Safety Key
Battery Door
Battery Pack

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OPERATING YOUR LAWN MOWER
STARTING/STOPPING THE MOWER (See Figure 7)
To start the motor:
• Press and hold the starter button(1).
• While holding the starter button in pull the switch lever (2) toward you until it touches
the handle. The starter button must be pressed in and held before pulling the handle.
Once the lawn mower starts, release the starter button.
Figure 7
To stop the motor:
• Release the switch lever (2).
SOFT-START
This LI-ION Mower is equipped with a “Soft-start” feature. When initially starting up, the
mower will take approx. 3 seconds to get up to full speed. If the mower does not
initially start: Remove the battery and check under the mower deck to ensure there is
nothing obstructing the blade and that the blade can spin freely by hand. Even a small
amount of grass on start up will prevent the “soft-start” from turning the mower on.
CAUTION: Do not attempt to override the operation of the start button or bail lever.
WARNING: The operation of any mower can result in foreign objects being thrown
into the eyes, which can cause severe eye damage. Always wear safety glasses while
operating the mower and while performing any adjustments or repairs.
1
2

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WARNING: Ensure that other people and pets remain at least 100 ft (30 m) away when
the mower is in use.
INSPECT THE CUTTING AREA. Remove all stones, sticks, wires, bones, and other
debris that might be thrown by the rotating blades.
CUTTING HEIGHT ADJUSTMENT (See Figure 8)
When shipped, the wheels on the mower are set to the lowest cutting position. Before
using the mower for the first time, raise the cutting position to the height best suited for
your lawn. The average lawn should be between 1.18" to 2" during cool months and
between 2" and 3" during hot months.
To adjust the blade height:
• To raise the blade height, grasp the Front height adjustment lever (1) and Rear
height adjustment lever (2) move it toward the front of the mower.
• To lower the blade height, grasp the height adjustment lever (1) and Rear height
adjustment lever (2) move it toward the back of the mower.
Figure 8
• Make sure to keep front and rear lever at same position before using.
2
1

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WARNING: Slopes are a major factor related to accidents involving slips and falls,
which can result in severe injury. Operating the mower on a slope requires extra
caution. If you feel uneasy on a slope, do not mow it. For your safety, use the slope
gauge that is included as part of this manual to measure slopes before operating this
unit on a sloped or hilly area.
• Mow across the face of a slope, and never up and down. Exercise extreme caution
when changing direction on a slope.
• Watch for holes, ruts, rocks, hidden objects, or bumps that may cause a slip or a trip.
Tall grass can hide obstacles.
• Always be sure of your footing. If you feel like you are losing your balance, release
the blade/ motor control handle immediately. The blade will stop rotating within 3
seconds.
• Do not mow near drop-offs, ditches, or embankments, because you could lose your
footing or balance.
• Do not mow a slope that has an angle of greater than 15°, as determined using the
slope gauge.
• Do not mow wet or damp grass. Unstable footing can cause slipping.
WARNING: Do not mow a slope that has an angle of greater than 15° (a rise of
approximately 2 1/2’ [.75 m] every 10’ [3 m]). Mow across the face of a slope, and never
up and down.
Fig. 9

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MOWING TIPS
NOTE: A sharp blade will greatly enhance the performance of the mower, especially
when cutting high grass. Be sure to check the blade and to sharpen it at least once
per year, as described in the Maintenance section.
• Verify that the lawn is free of stones, sticks, wires, and other objects that could
damage the blades or the motor. These objects could be accidentally thrown by the
mower in any direction, and could cause serious personal injury to the operator and
to others. In order to prevent electric shock, do not operate the mower in damp or
wet conditions.
• Do not mow in circles. Travel back and forth across the lawn.
• When cutting thick grass, reduce walking speed in order to allow for a more effective
cut and a proper discharge of the clippings.
• For a healthy lawn, always cut off one-third or less of the total length of the grass.
The average lawn should be approximately 1.18" to 2" long during cool months, and
between 2" to 3" long during hot months.
• MULCHING TIPS
NOTE: INSPECT THE AREA WHERE THE MOWER IS TO BE USED, AND REMOVE ALL STONES,
STICKS, WIRE, BONES, AND OTHER DEBRIS THAT MIGHT BE THROWN BY THE ROTATING
BLADE.
• Release the switch to turn the mower OFF when crossing any graveled area (stones
can be thrown by the blade).
• Set mower to the highest cutting height when mowing on uneven ground or in tall
weeds.
• For effective mulching, do not cut wet grass, because it tends to stick to the
underside of the deck, preventing proper mulching of grass clippings. New or thick
grass may require a narrower cut. The ground speed should be adjusted to the
condition of the lawn. If mowing has been delayed and the grass has been allowed
to grow longer than 4", mow the lawn twice in order to reduce the grass height to a
maximum of 3 1/4”.
• Walk at a steady pace. Overlap the cutting rows. Do not let the grass get too tall. If
the grass gets too long, start at the highest cutting position and work down to the
desired cutting height.
WARNING: If you strike a foreign object, stop the motor and remove the battery.
Thoroughly inspect the mower for any damage. Repair any damage before operating
the mower. Excessive vibration of the mower during operation is an indication of
damage. Thoroughly inspect the mower and repair any damage before operating the
mower.