Best Sun Joe Cordless Grass Shear & Hedge Trimmer
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A search for best sun joe cordless grass shear and hedge trimmer points to one product: the Sun Joe HJ604C, a handheld cordless tool that switches between a 4-inch grass shear blade and a 6-inch hedge trimmer blade. The listing gives a 7.2-volt rechargeable lithium-ion battery rated at 1.5 Ah, a 1250 RPM motor and a weight of 2.5 pounds. It gives 30 to 60 minutes of runtime per charge, but no conditions for that figure. This post sets out what the listing states, what it leaves out, and where a light handheld shear is the wrong tool.
Quick answer
- The listing describes one handheld cordless tool with two blades: a 4 in. grass shear and a 6 in. hedge trimmer, exchanged with one touch.
- The battery is a 7.2V rechargeable lithium-ion pack rated at 1.5Ah. The listing gives 30 to 60 minutes of runtime per charge.
- The box includes both blades, two protective covers, a wall charger and the rechargeable battery. The listing gives a weight of 2.5 pounds.
- Skip it if your work is thicker growth or formal hedge shaping, since the listing gives no branch capacity and the extension guides place hedge shears in that job.
The product at a glance
The table lists only what the listing states, as read on 2026-10-23. Where the listing is silent, the cell says not stated.
| Item | What the listing states |
|---|---|
| Brand | Sun Joe |
| Model | HJ604C (from the title) |
| Type | Handheld cordless, 2-in-1 grass shear and hedge trimmer |
| Power source | Battery powered |
| Battery | 7.2V rechargeable lithium-ion, 1.5Ah |
| Runtime | 30 to 60 minutes per charge, as the listing says |
| Motor | 1250 RPM; motor type not stated |
| Blades | 4 in. grass shear and 6 in. hedge trimmer, one-touch exchange |
| Blade material | Hardened steel (bullet) |
| Weight | 2.5 lbs (spec line) |
| Safety | Built-in safety switch (bullet) |
| Included | Both blades, two protective covers, wall charger, rechargeable battery |
| Charge time | not stated |
| Maximum branch diameter | not stated |
| Dimensions | not stated |
| Warranty | Stated in a bullet; length not stated |
The table is the whole listing in brief. What it leaves open, namely charge time, branch diameter and warranty length, is the part to check with the seller before you order.
Who it suits
The listing says the ergonomic grip reduces wrist and shoulder fatigue. That is a listing claim, and because the lines recorded for this post give no dimensions, a reader cannot compare the grip with other tools on paper. A check in a store, if one is available, is the only way to judge the grip before you buy.
This tool suits a homeowner who edges, trims grass along fence lines and tidies light hedge growth, and who wants one handheld tool with two heads. The listing describes the 2-in-1 design as one tool that swaps blades, and it gives 2.5 pounds, which is light for handheld work. Those are the reasons the listing itself gives for the tool.
The blade sizes set the limit. A 4 in. grass shear and a 6 in. hedge trimmer blade suit small, soft growth. The Iowa State guide puts hand pruners at branches up to 3/4 inch in diameter. That is a different tool, but it gives a rough sense of where small-tool work usually ends. The listing gives no maximum branch diameter for the HJ604C, so do not assume the shear will handle wood that a hand pruner cannot.
Oklahoma State University Extension warns that trimmers and edgers can damage tree trunks, landscape plants, house trim, fences and people if you trim too close to them. Keep the blade a safe distance from those things, and make sure children and pets stay out of the area before you start.
If your hedge work is about shaping formal lines rather than light trimming, a bigger tool may fit better. Our cordless grass shear and hedge trimmer guide covers options for that job.
Matching the tool to the job
Think about the three cutting jobs the listing implies. The first is grass along edges, fences and walls, where the 4 in. grass shear does the work. The second is light hedge tidying on a low hedge, where the 6 in. hedge trimmer blade fits. The third is small stems, where the listing gives no diameter and the pruning guides point to hand tools. For the first two jobs, the listing says the 1250 RPM motor drives hardened steel blades through grass, small branches and woody stems. That is a claim to check against your own yard.
Changing the blade
The listing says the two blades exchange with one touch. Before you change blades, remove the battery. The Oklahoma State University teen safety sheet says to remove the battery before maintenance to prevent accidental starts, and a blade change is a maintenance step. Keep the protective cover on the blade you are not using, and make sure the new blade is seated before you put the battery back in. The listing does not describe the locking action, so ask the seller how the blade locks in place.
Before you start
- Read the operator’s guide before using any lawn tool, as the Oklahoma State University column advises. The listing names a safety switch but does not describe how it works.
- Double-check that the battery is charged before each use, and store batteries indoors in a dry, climate-controlled area when you can.
- Before any maintenance, remove the battery so the tool cannot start by accident. The Oklahoma State University teen safety sheet makes that point for cordless tools.
- Wear protective clothing when you operate the tool, and keep children and pets out of the work area.
Routine checks
The listing gives a battery rating and a runtime range, so the practical check is to note how long one charge lasts on your own grass and hedge growth. Store the battery indoors, as the teen safety sheet advises, and use the two protective covers that come in the box whenever the tool is not in use, since the listing names them as included. The listing gives no maintenance interval, so anything beyond these checks should come from the seller or the manufacturer’s documentation.
Mistakes to avoid
- Assuming the runtime applies to heavy trimming. The listing gives 30 to 60 minutes without conditions, on a 1.5Ah battery.
- Assuming the blade handles thick stems. The listing names no maximum diameter, and the pruning guides place hand tools at small branches.
- Assuming the battery is charged when you pick up the tool. Check the charge before each session.
- Assuming the 2-in-1 design gives you a full hedge trimmer. The listing gives a 6 in. hedge blade and no maximum branch size, so set your expectations for small, soft growth.
Before you order
- Ask for the charge time, because the listing gives none.
- Ask for the maximum branch diameter, since the listing names none.
- Ask whether the 2.5 pounds includes the battery.
- Ask for the warranty length and coverage, because the listing says only that a warranty is stated.
Skip it if
- You need to cut branches thicker than a small stem. The listing gives no maximum diameter, and the Iowa State guide places hand pruners around 3/4 inch.
- You want to shear formal hedges for long stretches. The Iowa State guide says hedge shears are used to shear formal hedges to a definite size and shape, which is a specific job.
- You need a runtime beyond 30 to 60 minutes per charge, or you want to share a battery you already own. The listing names no other battery or tool.
- Children or pets will be near the work. Both Oklahoma State University pages advise keeping them out of the area before you start.
What the listing does not say
Charge time. The listing gives a runtime range but no charge time, so you cannot plan a full recharge from the listing alone.
Runtime conditions. The 30 to 60 minutes is given without the grass height, blade load or hedge density behind it.
Energy. The listing gives a voltage and an amp-hour rating but no energy figure. Multiplying them gives 7.2 V x 1.5 Ah = 10.8 watt-hours. That is our calculation from the listing’s numbers, not a figure the listing states.
Branch diameter. No maximum branch diameter is given for either blade.
Dimensions. The lines recorded for this post give no overall length, handle length or reach. That matters for edging along low walls and under shrubs, where the reach of the tool decides whether you can get the blade into the spot at all.
Motor type. The listing gives 1250 RPM but does not name the motor type.
Warranty length. The listing says a warranty is stated. It does not give the length or the coverage.
For battery and charger questions on a different hedge trimmer, our BLACK+DECKER hedge trimmer battery and charger guide covers that topic.
How we chose
This post covers one product: the Sun Joe 2-in-1 cordless grass shear and hedge trimmer with ASIN B01730O8NE, listed as model HJ604C. It is in the post because its listing matches the keyword and states the blade sizes, the battery, the motor, the weight and the kit contents. Those details let the post describe the tool without guessing at the rest.
The listing was read on 2026-10-23. This post uses only its title, bullet points and specification lines. Prices, ratings, seller details and images were not recorded or used. We did not rank this tool against other shears and do not call it the best cordless option. The safety points come from Oklahoma State University Extension and Iowa State and Nebraska extension pages opened on 2026-10-22, which describe pruning and lawn tools in general.
The criteria were practical. The listing had to match the keyword, name the blade sizes and the battery, give a weight, and list what comes in the box. The post does not compare the HJ604C with other shears, so a reader who wants that comparison should look for a comparison page.
What we could not verify
The sources we opened do not cover this model. The 30 to 60 minute runtime, the 1250 RPM figure and the claim of clean cuts without jamming are the listing’s own statements, and this post cannot confirm them. The claim of clean cuts without jamming is about the tool in use, and this post cannot say how often the blades jam in dense grass or on woody stems.
The extension pages describe pruning and lawn tools in general. None names the HJ604C, so the safety points are general guidance and not a statement about this tool’s features.
The sources give no typical runtime or cut rate for a 7.2-volt handheld shear, so this post does not offer one.
FAQ
Is the Sun Joe HJ604C a grass shear or a hedge trimmer?
Both. The listing describes a 2-in-1 tool with a 4 in. grass shear blade and a 6 in. hedge trimmer blade that you exchange with one touch.
How long does one charge last?
The listing says 30 to 60 minutes of runtime per charge. It does not state the conditions behind that range, such as grass height or blade load.
Does the kit include a charger?
Yes. The listing says a wall charger, a rechargeable battery, both blades and two protective covers come in the box.
How much does the Sun Joe HJ604C weigh?
The listing gives 2.5 pounds, which is light for a handheld tool. It does not say whether that figure includes the battery.
Can it trim thick branches?
The listing gives no maximum branch diameter. The Iowa State guide puts hand pruners at branches up to 3/4 inch, which is a different tool, so use a pruner or a saw for thicker wood.
Is it safe to use near children and pets?
Keep them out of the work area. The Oklahoma State University column advises making sure children and pets are not in the area before trimming.
Bottom line
Buy the HJ604C only for light edging and small trimming. If your work is thicker growth or formal hedge shaping, skip it.
Sources
- Sun Joe HJ604C 2-in-1 Cordless 7.2V Handheld Grass Shear & Hedge Trimmer, Amazon listing (opened 2026-10-23) https://www.amazon.com/dp/B01730O8NE
- Beyond The Mower: Safe Use Of Trimmers, Edgers And Blowers | Oklahoma State University (opened 2026-10-22) https://extension.okstate.edu/announcements/grow-gardening-columns/2025/august-24-2025.html
- Lawn Care Safety and Basic Maintenance Tips for Teens | Oklahoma State University (opened 2026-10-22) https://extension.okstate.edu/fact-sheets/lawn-care-safety-and-basic-maintenance-tips-for-teens
- Guide to Pruning Equipment | Yard and Garden, Iowa State University Extension (opened 2026-10-22) https://yardandgarden.extension.iastate.edu/how-to/guide-pruning-equipment
- The Basics of Pruning Tools | Nebraska Extension in Lancaster County (opened 2026-10-22) https://lancaster.unl.edu/basics-pruning-tools
