Introduction

The STIHL HSA 25 Garden Shears are an essential tool for any gardening enthusiast, designed for precision and ease of use. These lightweight, battery-operated shears feature a 7.5-inch blade, making them perfect for trimming and shaping small bushes and shrubs. With a comfortable grip and ergonomic design, they reduce fatigue during extended use. Priced at approximately $150, the HSA 25 offers excellent performance and reliability for maintaining a well-groomed garden.

Specifications

Intended for household use.

Approved battery type: STIHL 5230.4 battery for STIHL HSA 25
Weight without battery: 1.3 lbs. (0.6 kg)

Cutting Attachments

Shrub Cutting Blades

Tooth spacing: 0.75 in. (19 mm)
Cutting length: 7.85 in. (200 mm)
Sharpening angle: 30°

Grass Cutting Blades

Tooth spacing: 0.63 in. (16 mm)
Cutting length: 4.7 in. (120 mm)
Sharpening angle: 35°

STIHL Battery 5120.4 for STIHL HSA 25

Approved charger type: STIHL Charger for STIHL HSA 25
Battery technology: Lithium-Ion
Voltage: 10.8 V
Rated capacity in Ah¹: 2 Ah
Stored energy in Wh²: 21.6 Wh
Permissible ambient temperature range during use or storage: 32 °F to 104 °F (0 °C to 40 °C)

Rated capacity calculated pursuant to IEC 61960. Usable energy available to the operator will be less. ² The battery is marked with its stored energy as provided by the cell manufacturer. Usable energy available to the operator will be less.

STIHL Charger for STIHL HSA 25

Mains voltage: 120 V
Rated current: 0.1 A
Frequency: 60 Hz
Charging current: 0.75 A
Rated power: 12 W
Insulation: Class II (Double Insulation)
Permissible ambient temperature range during charging: 41 °F to 104 °F (5 °C to 40 °C)

Main Parts

Garden Shears, Battery and Charger

Carrying Bag
Designed for transporting and storing the garden shears, battery, charger and accessories.
Battery
Supplies electrical power to the motor.
Plug
Connect the power supply cord to a wall outlet.
Power Supply Cord
Supplies the charger with electricity when plugged into a wall outlet.
Charger
Charges the battery.
Charger LED
Indicates the operating status of the charger.
Retaining Latch
Locks/unlocks the trigger switch.
Trigger Switch
Activates the cutting attachment.
Battery Compartment
Holds the battery.
Rating Plate: Contains electrical information and the product's serial number.

Cutting Attachments

Shrub Blades
Steel blades for cutting shrubs.
Blade Scabbard
Covers the shrub blades to reduce the risk of injury from inadvertent contact during transportation and storage.
Grass Blades
Steel blades for cutting grass.
Blade Scabbard
Covers the grass blades to reduce the risk of injury from inadvertent contact during transportation and storage.

General Power Tool Safety Warnings

Warnings and instructions for handheld, motor-operated electric power tools and motor-operated electric hedge trimmers / garden shears with mounted shrub blades. Additional important warnings and instructions are provided in subsequent chapters of this manual.

WARNING

Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.
Save all warnings and instructions for future reference. The term “power tool” in the warnings refers to your mainsoperated (corded) power tool or battery-operated (cordless) power tool.

Work Area Safety

Keep work area clean and well lit. Cluttered or dark areas invite accidents.
Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.

Electrical Safety

Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce the risk of electric shock.
Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock.
When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) or ground fault circuit interruptor (GFCI) protected supply. Use of an RCD or GFCI reduces the risk of electric shock.

Personal Safety

Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating power tools may result in serious personal injury.
Use personal protective equipment. Always wear eye protection. Protective equipment such as dust mask, nonskid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.
Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energizing power tools that have the switch
on invites accidents.
Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.
Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
Dress properly. Do not wear loose clothing or jewellery. Keep your hair and clothing away from moving parts. Loose clothes, jewellery or long hair can be caught in moving parts.
If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of dust collection can reduce dust-related hazards.
Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of a second.

Power Tool Use and Care

Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed.
Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
Disconnect the plug from the power source and/or remove the battery pack, if detachable, from the power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of untrained users.
Maintain power tools and accessories. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool's operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed. Use of the power tool for operations different from those intended could result in a hazardous situation.
Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery handles and grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.

Battery Tool Use and Care

Recharge only with the charger specified by the manufacturer. A charger that is suitable for one type of battery pack may create a risk of fire when used with another battery pack.
Use power tools only with specifically designated battery packs. Use of any other battery packs may create a risk of injury and fire.
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 burns or a fire.
Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns.
Do not use a battery pack or tool that is damaged or modified. Damaged or modified batteries may exhibit unpredictable behaviour resulting in fire/explosion or risk of injury.
Do not expose a battery pack or tool to fire or excessive temperature. Exposure to fire or temperatures above 100 °C may cause explosion.
Follow all charging instructions and do not charge the battery pack or tool outside the temperature range specified in the instructions. Charging improperly or at temperatures outside the specified range may damage the battery and increase the risk of fire.

Service

Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.
Never service damaged battery packs. Service of battery packs should only be performed by the manufacturer or authorized service provider.

Hedge Trimmer / Garden Shears with Mounted Shrub Blades Safety Warnings

Keep all parts of the body away from the cutter blade. Do not remove cut material or hold material to be cut when blades are moving. Make sure the switch is off when clearing jammed material. Blades coast after turn off. A moment of inattention while operating the garden shears may result in serious personal injury.
Carry the garden shears by the handle with the cutter blade stopped. Proper handling of the garden shears will reduce possible personal injury from the cutter blades.
Hold the power tool by insulated gripping surfaces only, because the cutter blade may contact hidden wiring. Cutter blades contacting a "live" wire may make exposed metal parts of the power tool "live" and could give the operator an electric shock.

DANGER
Keep hands away from blade. Contact with blade will result in serious personal injury.

Battery Safety

Warnings and Instructions

WARNING

Use of unauthorized batteries can damage the garden shears and result in fire, explosion and personal injury and property damage.
- Use only the STIHL 5120.4 battery to power the HSA 25.
Use of the STIHL 5120.4 battery for any purpose other than powering the STIHL HSA 25 could be extremely dangerous.
- Use the STIHL 5230.4 battery only to power the STIHL HSA 25. Do not use it for other purposes.
Use of unauthorized chargers can damage the battery and result in fire, explosion and personal injury and property damage.
- Use only the charger provided with the HSA 25 to charge the STIHL 5120.4 battery.
The battery contains safety features and devices which, if damaged, may allow the battery to generate heat, rupture, leak, ignite or explode.
- Never heat the battery above 212 °F (100 °C).
- Never incinerate or place the battery on or near fires, stoves or other high-temperature locations.
- Never use or charge a malfunctioning, damaged, cracked, leaking or deformed battery.
- Never open, disassemble, crush, drop, subject to heavy impact or otherwise damage the battery.
- Never expose the battery to microwaves or high pressures.
- Never insert objects into the battery's cooling slots.
High temperatures may cause the battery to generate heat, rupture, leak, ignite or explode, resulting in severe or fatal personal injury and property damage. Exposure to temperatures outside the recommended temperature range may also reduce battery life and performance.
- Use and store the battery only within an ambient temperature range of 32 °F to 104 °F (0 °C to 40 °C).
- Never store the battery in direct sunlight or inside a vehicle in hot weather.
To reduce the risk of personal injury and property damage in the event the battery emits smoke, an unusual smell or feels unusually hot while using, charging or storing:
- Immediately discontinue using or charging the battery. Contact the authorities in the event of fire or explosion.
To reduce the risk of a short circuit, which could lead to electric shock, fire and explosion:
- Never immerse the battery in water or other liquids.
- Never bridge the battery terminals with wires or other metallic objects.
- Keep a battery that is not in use away from metal objects (e.g., paper clips, nails, coins, keys).
- Never transport or store the battery in a metal container.
- Store the battery indoors in a dry room.
- Never store the battery in damp or corrosive environments or in conditions that could lead to corrosion of its metal components.
- Never store the battery in the garden shears or charger.
- Protect the battery from exposure to corrosive agents such as garden chemicals and de-icing salts.
- Protect the battery from exposure to conductive liquids such as salt water.
- Do not attempt to repair, open or disassemble the battery. There are no user-serviceable parts inside.
Leaking battery fluid is potentially harmful and can cause skin and eye irritation, chemical burns and other serious personal injury.
- Avoid contact with skin and eyes.
- Use an inert absorbent such as sand on spilled battery fluid.
- In the event of accidental contact, immediately rinse the contact area thoroughly with mild soap and water.
- If fluid gets into your eye(s): Do not rub. Rinse water over the open eye(s) for at least 15 minutes and seek medical attention.
A battery fire can be dangerous. To reduce the risk of severe personal injury and property damage in the event of fire:
- Evacuate the area. Fire can spread rapidly. Stay clear of any vapors generated and maintain a safe distance.
- Contact the fire department.
- Although water can be used to put out a battery fire, use of a multi-purpose dry chemical fire extinguisher is preferable.
- Consult the fire department regarding proper disposal of a burned battery.
Dropping the battery could result in personal injury or property damage. To prevent the battery from falling during removal:
- Place the garden shears on a level surface.
- Use care when ejecting the battery.

Maintenance, Repair and Storage

Warnings and Instructions

WARNING

There are no user-authorized repairs for the garden shears, battery or charger. To reduce the risk of fire, electric shock or other personal injury and property damage:
- Users may carry out only the cleaning and maintenance operations described in this manual. Users must not attempt any other cleaning, maintenance or repair.
- Strictly follow the cleaning and maintenance instructions in the appropriate sections of this instruction manual.
- STIHL recommends that all repair work be performed by authorized STIHL servicing dealers.
Unintentional starting may result in personal injury or property damage. To reduce the risk of personal injury and property damage from unintentional starting:
- Remove the battery before inspecting the garden shears or carrying out any cleaning, maintenance or repair work, before storing, and any other time the garden shears are not in use.
The cutting blades are the only user-serviceable parts of the garden shears. Proper maintenance will help maintain cutting performance and reduce the risk of personal injury.
- Wear heavy-duty non-slip work gloves when handling the cutting blades.
- Keep the cutting blades clean and sharp.
- Tighten all nuts, bolts and screws after each use.
- Never repair damaged cutting blades by welding, straightening or modifying the shape. This may cause parts of the cutting blades to experience uneven or excessive wear or other damage that can lead to a malfunction or breakage during operation, resulting in serious or fatal injuries.
Use of parts that are not authorized or approved by STIHL may cause serious or fatal injury or property damage.
- STIHL recommends that only identical authorized STIHL replacement parts be used for repair or maintenance.
To reduce the risk of electric shock:
- Unplug the charger from the wall outlet before inspecting or cleaning the charger.
- Regularly check the charger and ensure that the insulation of the power supply cord and plug are in good condition and show no signs of aging (brittleness), wear or damage.
- Replace the charger if the power supply cord becomes worn or damaged. The power supply cord cannot be repaired or replaced.
To reduce the risk of short circuit and fire:
- Keep the battery guides free of foreign matter. Clean as necessary with a dry cloth or soft, dry brush.
Improper storage can result in unauthorized use, damage to the garden shears, battery and charger, and an increased risk of fire, electric shock and other personal injury or property damage.
- Remove the battery from the garden shears before storing.
- Never store the garden shears and charger with the battery inserted.
- Before storing, always unplug the charger from the wall outlet and remove the battery.
- Store the garden shears, battery and charger indoors in a dry, secure place that cannot be accessed by children or other unauthorized users.
- Never store the battery in the garden shears, in the charger, in a metal container or in a container with metal objects (e.g., paper clips, nails, coins, keys).

Charging the Battery

Setting up the Charger

To set up the charger:

Insert the plug (2) into a properly installed wall outlet (3) matching the voltage and electrical frequency stated on the rating plate on the charger.
Position the power supply cord (1) so that it will not be stepped on, tripped over, come in contact with sharp objects or moving parts or otherwise present a tripping hazard or be subjected to damage or stress.

Charging

WARNING

STIHL batteries contain safety features and devices which, if damaged, may allow the battery to generate heat, rupture, leak, ignite or explode.
Never charge a malfunctioning, damaged, cracked, leaking or deformed battery or use a charger that has been damaged.
For indoor use only. Keep the charger dry. Protect it from rain, water, liquids and damp conditions.
Never insert a wet battery. Never use a wet charger.

To charge the battery:

Push the battery (1) into the charger (3) until it stops. The right LED on the charger (2) flashes green when the battery is charging.
The charging process is complete when the right LED on the charger continuously glows green.
The charger turns itself off when the battery is fully charged. The LED will continue to glow green. Remove the battery from the charger and disconnect the power supply cord from the wall outlet when charging is complete.
A battery is not fully charged when it ships from the factory. STIHL recommends that you fully charge the battery before using it the first time.
Operate the charger only indoors, in dry rooms and within an ambient temperature range of 41 °F to 104 °F (5 °C to 40 °C).
The battery heats up during operation of the garden shears. If a hot battery is inserted into the charger, it may be necessary for it to cool down before charging starts. The charging process begins only after the battery has cooled down sufficiently.
Charging time depends on a number of factors, including battery condition and ambient temperature. For a complete list of approximate charging times, see www.stihl.com/charging-times.

LED Diagnostics

LEDs on the Charger
Two LEDs show the status of the charger and the battery. The LEDs can glow or flash green or red.

Mounting and Removing a Cutting Attachment

Mounting the Cutting Attachment

WARNING

Make sure the battery is removed before starting assembly.

WARNING

Making contact with the cutters may result in serious cut injuries, even if the cutting blades are not moving.
Always wear heavy-duty work gloves when mounting or otherwise handling the cutting blades.
The grass blades and shrub blades are mounted to the garden shears in the same way.

To mount the cutting blade:

Switch off the garden shears.
Remove the battery.
Slide a blade scabbard over the cutting blades so that it covers the entire cutting attachment.
Insert the clips (1) of the cutting attachment into the guides (2) on the garden shears.
Move the other end of the cutting blade downward and press firmly until you hear an audible click.
Remove the blade scabbard (4).

Removing the Cutting Attachment

To remove the cutting attachment:

Switch off the garden shears.
Remove the battery.
Slide a blade scabbard over the cutting blades so that it covers the entire cutting attachment.
Press down on the locking levers (1) to unlock cutting attachment (2).
Lift up to remove the cutting attachment.

NOTICE

A piece of foam (3) is designed to protect the gear from dirt during operation. This piece of foam is firmly attached to the garden shears and cannot be removed.

Inserting and Removing the Battery

Inserting the Battery

WARNING

Never use a malfunctioning, damaged, cracked, leaking or deformed battery. Use and store the battery only within an ambient temperature range of 32 °F to 104 °F (0 °C to 40 °C),.

WARNING
To reduce the risk of unintended activation, never store the battery in the garden shears.

To insert the battery:

Insert the battery (2) into the battery compartment (1) until it stops.
In this position, there is electrical contact between the battery and the garden shears.
Since a new battery is not fully charged, STIHL recommends that you fully charge the battery before using it the first time.

Removing the Battery

WARNING
To reduce the risk of severe personal injury from unintended activation, always remove the battery before assembling, transporting, adjusting, cleaning, servicing, maintaining or storing the garden shears and any other time it is not in use.

WARNING
Use care when ejecting the battery to prevent it from falling and causing personal injury or property damage.

To remove the battery:

Release the trigger switch.
Press down on the locking levers (1) to eject the battery (2) from the battery compartment.

NOTICE

Avoid exposing the battery to excessive heat or prolonged periods of direct sunlight. Use or storage outside the recommended ambient temperature range can reduce the performance and/or service life of the battery.

Switching the Garden Shears On and Off

Switching On

WARNING

To reduce the risk of serious or fatal injuries to the operator or bystanders from blade contact, keep hands, feet and other parts of the body away from the cutting blades.
Do not touch the cutting blades while the battery is inserted.
Never touch moving cutting blades with your hand or any part of your body.

WARNING

Never operate your garden shears if they are modified, damaged, improperly adjusted or maintained, not completely and securely assembled or not functioning properly.
To reduce the risk of personal injury, always wear proper clothing and protective apparel, including proper eye protection, when operating your garden shears.

Before switching on:

Make sure you have a secure and firm footing.
Stand upright.
Always hold and operate the garden shears with one hand firmly on the control handle. Keep your other hand clear of the cutting attachment.

To switch the garden shears on:

Unlock the retaining latch (1) by pushing it forward with your thumb. Hold it in this unlocked position. Squeeze the trigger switch (2) with your index finger. The cutting blades will start moving.
The motor will not switch on unless the retaining latch is unlocked and the trigger switch is pressed. Once the cutting attachment is activated, you may release the retaining latch.

Switching Off

WARNING

The cutting blades will continue to move for a short while after the trigger switch is released.
To avoid serious or fatal injury, avoid contact with the moving cutting blades.
To reduce the risk of personal injury from unintended activation or unauthorized use, switch off the motor, ensure the cutting blades have stopped, and remove the battery before transporting or putting the garden shears down.

To switch the garden shears off:

Release the trigger switch.
Once the trigger switch and retaining latch have been released, the retaining latch will return to its locked position and activation of the trigger switch will be blocked.
The cutting blades will continue to move for a short time after the trigger switch is released. Take care to avoid contact after releasing the trigger switch and when setting down the garden shears.

Checking the Controls

Testing the Controls

Before starting work, confirm that the retaining latch (1) and trigger switch (2) are undamaged and functioning properly:

WARNING

To reduce the risk of serious or fatal injuries, keep hands, feet and other parts of the body away from the cutting blades.
Do not touch the cutting blades while the battery is inserted.
Never touch moving cutting blades with your hand or any part of your body.
Keep bystanders out of the area while testing the controls.

To test the retaining latch and trigger switch:

Remove the battery.
Unlock the retaining latch by pushing it forward with your thumb.
Hold the retaining latch in the unlocked position.
Depress the trigger switch momentarily.
Release the retaining latch and trigger switch.

The retaining latch and trigger switch should return to their respective locked positions. If they do not, take the garden shears to an authorized STIHL servicing dealer to be repaired before use. If you can depress the trigger switch without first unlocking the retaining latch take the garden shears to an authorized STIHL servicing dealer to be repaired before use.

Description

Garden Shears features high-quality blades designed for precision cutting and long-lasting performance. The ergonomic handle is designed to reduce fatigue, allowing users to work comfortably for extended periods. The tool includes a safety switch to prevent accidental start-ups and an LED indicator for battery status. The compact design and lightweight construction make it easy to maneuver in tight spaces, making it ideal for detailed garden work.

STIHL Garden Shears HSA-25 During Operation

Cutting Shrubs

WARNING

To avoid serious or fatal injury, avoid contact with the moving cutting blades. Never hold the material to be cut or attempt to remove cut material without first releasing the trigger switch and removing the battery. Release the trigger switch and remove the battery before clearing jammed material.

WARNING

To reduce the risk of personal injury, never work with the garden shears in the rain or in wet or damp conditions.
Always wear proper clothing and protective apparel, including proper eye protection.
Work carefully and maintain proper control of the garden shears.
The garden shears are designed for one-handed operation.

Mount the shrub blades.
Before starting work with the garden shears, remove thick branches with a hand pruning saw, loppers, chain saw or other appropriate tool.

Cutting in a Vertical Plane

Move the shears from the bottom of the shrub upwards in a controlled arc (see illustration above).
Lower the nose of the cutting attachment, move along the shrub and move the cutting attachment up again in a controlled arc.

Cutting in a Horizontal Plane

Hold the cutting attachment at an angle of 0° to 10° as you move the cutting attachment horizontally, using both sides of the cutting attachment (see illustration above).
Observe all applicable laws, regulations, standards and ordinances.

Cutting Grass

WARNING

To reduce the risk of personal injury, never work with the garden shears in the rain or in wet or damp conditions.
Always wear proper clothing and protective apparel, including proper eye protection.
Keep bystanders away from the work area.
Work carefully and maintain proper control of the garden shears.

The garden shears are designed for one-handed operation.

Mount the grass blades.
Guide the garden shears parallel to the ground (see illustration above).
Move forward slowly.

Observe all applicable laws, regulations, standards and ordinances.

Setup Guide

To set up and operate the STIHL Garden Shears HSA-25, follow these steps:

Charge the battery according to the provided instructions.
Attach the battery to the shears by aligning the contacts and clicking it into place.
Ensure the safety switch is engaged before starting to prevent accidental start-ups.
Hold the shears with both hands, ensuring a firm grip on the ergonomic handle.
Squeeze the trigger to activate the blades.

Inspection and Maintenance

Inspecting and Maintaining the Garden Shears

WARNING

To reduce the risk of personal injury from unintended activation, remove the battery before inspecting the garden shears or carrying out any maintenance, @ 9. Carry out only the maintenance operations described in this manual. There are no user-authorized repairs. STIHL recommends that repair work be performed by authorized STIHL servicing dealers.

To properly maintain the garden shears:

Replace worn or damaged cutting blades.
Have worn, missing or damaged safety labels replaced by an authorized STIHL servicing dealer.

If you make a warranty claim for a component that has not been serviced or maintained properly, coverage may be denied.

Cutting Blades

WARNING

To reduce the risk of personal injury from unintended activation, remove the battery before inspecting the cutting blades or carrying out any maintenance.
To help prevent injuries, always wear heavy-duty work gloves when handling the garden shears or the cutting blades.
STIHL recommends having the cutting blades sharpened by an authorized STIHL servicing dealer.
Although it is best to have the cutting blades sharpened by a dealer, it is possible to use a flat, crosscut sharpening file to sharpen the cutting blades.
Sharpen the cutting blades when cutting performance begins to deteriorate, i.e., blades frequently snag on branches or fail to cut material cleanly.

Shrub Blades

To sharpen the shrub blades with a file:

Remove the shrub blades from the garden shears.
Sharpen each cutting edge of the upper shrub cutting blade with a sharpening file. Always file toward the cutting edge with a forward motion. The file only sharpens on the forward stroke. Lift off the blade on the backstroke.
Only sharpen the cutting edges. Do not file blunt projecting parts of the cutting attachment, or the cutting blade guard. Make sure your sharpening stroke matches the sharpening angle.
Turn the shrub blades over and sharpen the cutting edges of the lower shrub cutting blade.
Use a whetstone to remove any burrs from the cutting edges. Remove as little material as possible.
After sharpening, wipe away filing or grinding dust with a dry or slightly dampened cloth and then spray the cutting blades with a resin solvent, such as STIHL Resin Remover and Lubricant.

Grass Blades

To sharpen the grass blades with a file:

Remove the grass blades from the garden shears.
Move the upper grass cutting blade fully in one direction so that one side of the cutting edges is easily accessible.
Sharpen each accessible cutting edge of the upper grass cutting blade with a sharpening file. Always file toward the cutting edge with a forward motion matching the sharpening angle.
Sharpen on the forward stroke. Lift off the blade on the backstroke.
Only sharpen the cutting edges. Do not file blunt projecting parts of the cutting attachment, or the cutting blade guard. Make sure your sharpening stroke matches the sharpening angle.
Move the upper grass cutting blade fully in the other direction so that the other side of the cutting edges is easily accessible and sharpen the rest of the cutting edges.
Use a whetstone to remove any burrs from the cutting edges. Remove as little material as possible.
After sharpening, wipe away filing or grinding dust with a dry or slightly dampened cloth and then spray the cutting blades with a resin solvent, such as STIHL Resin Remover and Lubricant.

If you make a warranty claim for a component which has not been serviced or maintained properly, coverage may be denied.

NOTICE
Operating the machine with dull or damaged cutting blades may overload the motor. Keeping the cutting blades sharp helps maintain cutting performance and the expected life of the product.

Troubleshooting Guide

Garden Shears and Battery

Condition	LEDs on Charger	Cause	Remedy
Garden shears do not start when switched on.		No electrical contact between garden shears and battery.	Remove the battery. Visually check the electrical contacts in the battery compartment and on the battery. Reinsert the battery.
		Battery has low charge.	Charge the battery.
		Battery too hot / too cold.	Allow the battery to warm up or cool down gradually at ambient temperatures of about 50 °F to 68 °F (10 °C to 20 °C).
		Malfunction in battery or garden shears.	Remove the battery and reinsert it. Remove the cutting attachment and re-attach it. Switch on the gardenshears. If the garden shears still do not start when switched on, do not attempt to use. The battery or the garden shears have a malfunction and must be replaced.
		Garden shears too hot.	Allow the garden shearsto cool down.
Hedge trimmer cuts out during operation.		Battery too hot / too cold.	Remove the battery. Allow the garden shears and battery to cool down gradually at ambient temperatures of about 50 °F to 68 °F (10 °C to 20 °C).
		Garden shears too hot.

Always remove the battery before carrying out any inspection, cleaning or maintenance.

Condition	LEDs on Charger	Cause	Remedy
Runtime is too short.		Battery not fully charged.	Charge the battery.
		Useful life of battery has been reached or exceeded.	Have the battery checked by an authorized STIHL servicing dealer.
Battery is not being charged.	LED flashes red.	Malfunction in battery or charger.	Remove the battery and reinsert it. If the LED continues to flash, do not attempt to charge. Have the battery and the charger checked by an authorized STIHL servicing dealer.

Charger

Condition	LEDs on Charger	Cause	Remedy
Battery is not being charged.	LED flashes red.	No electrical contact between charger and battery.	Remove the battery and reinsert it into the charger.
		Malfunction in battery or charger.	Remove the battery and reinsert it. If the LED continues to flash, do not attempt to charge. Have the battery and the charger checked by an authorized STIHL servicing dealer.

STIHL Garden Shears HSA-25 Pros & Cons

Pros

Ergonomic design for comfortable use
High-quality blades for precise cutting
Lightweight and easy to maneuver
Long battery life for extended use
Safety features like a safety switch and LED indicator

Cons

Relatively higher price compared to manual shears
Charging time could be longer for some users
May require occasional blade sharpening or replacement
No storage compartment for blades when not in use

Customer Reviews

Customers have generally praised the STIHL Garden Shears HSA-25 for its ease of use, precision cutting, and long battery life. Some common complaints include the higher price point compared to manual shears and the need for occasional blade maintenance. Overall, it is considered a reliable and efficient tool for garden maintenance.

Warranty

This product is sold subject to the STIHL Incorporated Limited Warranty Policy, available at https://www.stihlusa.com/warranty.html

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