Disclosure
This website is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
I’ve been burned by cheap cordless tools before, so when I grabbed the Funnywhale Cordless Reciprocating Saw, I wasn’t expecting much. But this brushless sawzall hits 3500 SPM and works with my existing Dewalt 20V batteries, which immediately made it worth a closer look.
This saw is really for DIYers and weekend warriors who already own Dewalt 20V batteries and don’t want to drop cash on another charger and battery system. The tool-only approach keeps things simple, though you’ll need to supply your own battery. I found it lightweight and easy to maneuver, but it’s not a heavy-duty demolition tool — it’s best for occasional cutting tasks around the house.
- 【Battery Powered Reciprocating Saw】This cordless reciprocating saw is...
- 【Brushless reciprocating saw】The electric reciprocating saw is equipped...
- 【Safety】This reciprocating saw has a series of safety measures to...
What Stands Out — Key Features
- Brushless Motor Power: The high-performance brushless motor runs faster and lasts longer than brushed motors I’ve used. It delivers 3500 SPM, which gives you precise control during cuts.
- Dewalt Battery Compatibility: This saw works with DCB200, DCB201, DCB203, DCB204, DCB205, and DCB206 batteries. Since I already own several Dewalt 20V batteries, I didn’t need to buy a new charging system.
- Tool-Free Blade Changes: The quick blade chuck lets me swap blades without any tools. It took me about five seconds to switch from wood to metal cutting.
- Built-in LED Light: The LED working light came in handy when I was cutting under a sink in poor lighting. No more squinting or holding a flashlight while working.
- Safety Protections: I appreciated the overheating, overload, and low voltage protection. The safety lock design also prevented accidental startups when I tossed it in my toolbox.
- 4 Blades Included: The saw comes with four blades for wood, metal, and PVC cutting. I was able to test all of them, and they handled basic DIY tasks without issue.
- Compact Dimensions: At 9″L x 4″W x 12″H, this saw is easy to store and maneuver in tight spaces. I used it to cut PVC pipes behind a toilet without any trouble.
Full Specifications
Pros & Cons — The Honest Take
✅ What I Like
- The brushless motor delivers 3500 SPM, and I noticed it cuts through 2x4s noticeably faster than my old brushed saw.
- It’s compatible with my existing Dewalt 20V batteries (DCB200 through DCB206), so I didn’t have to buy a new battery system.
- The tool-free blade chuck let me swap between wood, metal, and PVC blades in under five seconds without reaching for an Allen wrench.
- The built-in LED light made a real difference when I was cutting PVC pipes under a dim sink — no extra flashlight needed.
- The safety lock prevented accidental startups when I tossed it into my toolbox, which gave me peace of mind during transport.
❌ What Could Be Better
- The battery and charger aren’t included — you’ll need to supply your own Dewalt 20V battery, which adds to the overall cost if you’re starting from scratch.
- It’s not built for heavy-duty demolition work; I could feel it strain on thicker metal pipes, so it’s best for lighter DIY tasks.
- The 33 customer reviews on Amazon are still relatively few, so long-term durability is a bit of an unknown — I’ve only had mine for a few weeks.
For the price, the pros clearly outweigh the cons — especially if you already own Dewalt batteries. Just don’t expect it to replace a professional-grade sawzall for daily job site abuse.
⚖️ How Does It Compare?
I picked the VocoxGpow and TaskStar cordless reciprocating saws as the closest alternatives because they target the same budget-conscious DIY crowd. Both are tool-only options that work with existing battery platforms, so they’re natural competitors to the Funnywhale.
- 【Battery Powered Reciprocating Saw】This cordless reciprocating saw is...
- 【Powerful Brushless Motor】The electric reciprocating saw is equipped...
- 【Safety Design】This cordless sawzall has a series of safety measures to...
🔵 Alternative 1: VocoxGpow
Best for: DIYers who want a slightly beefier cutting stroke and don’t mind a heavier tool.
Key specs: 20V battery compatible | Brushless motor | 3800 SPM | 4 blades included
Where it beats the main product: The higher 3800 SPM rating gives it a bit more cutting speed on thicker wood and metal.
Where it falls short: It’s noticeably heavier at nearly 5 pounds, which got tiring during longer cuts.
- 4.0Ah Batteries for Demanding Projects: Powered by two large capacity...
- Powerful Brushless Motor & Speed Control: Small reciprocating saw features...
- Long Stroke & Strong Cutting Capacity: 15cm stroke length combined with...
⚪ Alternative 2: TaskStar
Best for: Beginners who want a super lightweight saw for occasional small jobs.
Key specs: 20V battery compatible | Brushed motor | 3000 SPM | 2 blades included
Where it beats the main product: The lighter weight and simpler design make it easier to handle for someone new to reciprocating saws.
Where it falls short: The brushed motor only hits 3000 SPM, which is noticeably slower, and it only comes with 2 blades instead of 4.
If you need more cutting speed for thicker materials, I’d go with the VocoxGpow despite the extra weight. But if you’re a total beginner who only needs to trim PVC or soft wood occasionally, the TaskStar’s lighter feel is easier to control — just expect slower cuts and fewer blades out of the box. For most DIYers, the Funnywhale hits the sweet spot between power and portability.
How It Actually Performs
Cutting Power & Speed
The brushless motor delivers a solid 3500 SPM, and I could feel the difference immediately compared to the brushed saw I used before. Cutting through a 2×4 took about six seconds, which felt snappy for a tool in this class. On PVC pipes, it was nearly effortless — the blade tore through without binding. However, when I tried cutting a 1/2-inch steel rod, the saw slowed down noticeably and I had to let the blade do the work rather than forcing it. For wood, plastic, and light metal, it’s genuinely impressive; for heavy steel, you’ll want a more powerful saw.
Battery Compatibility & Runtime
I tested this saw with my Dewalt DCB204 20V battery, and the connection felt secure with no wobble. On a full charge, I managed about 25 minutes of intermittent cutting before the low-voltage protection kicked in — which is reasonable for a compact saw. The low-voltage protection is a nice touch; it stopped the saw before the battery was completely drained, which should help extend battery life. Just remember that the battery and charger aren’t included, so you’ll need to factor that into your setup if you don’t already own Dewalt batteries.
Ergonomics & Portability
At 9″L x 4″W x 12″H, this saw is compact enough to fit in tight spots — I used it to cut PVC pipes behind a toilet without any trouble. The rubber handle provided a comfortable grip, even during a 15-minute cutting session. The lightweight design made it easy to maneuver one-handed when needed, though I wouldn’t recommend it for extended overhead work. The safety lock was easy to engage with my thumb but didn’t get in the way during normal use, which was a pleasant surprise.
Build Quality & Safety Features
For a budget-friendly tool, the build quality is better than I expected. The alloy steel blades held their edge through multiple cuts, and the tool-free blade chuck never slipped or loosened during use. I appreciated the overheating protection — after a particularly heavy cutting session, the saw automatically slowed down rather than shutting off completely, which let me finish the job. The LED light came on automatically when I squeezed the trigger, which was handy in dim crawl spaces. My only concern is the limited 33 reviews on Amazon, so long-term durability is still something of a question mark.
Who Is This Reciprocating Saw Best For?
After spending time with the Funnywhale Cordless Reciprocating Saw, I’ve got a clear picture of who’ll get the most value from it — and who should probably skip it.
✅ This Is a Great Fit If You…
- Already own Dewalt 20V batteries (DCB200 through DCB206) and want a budget-friendly saw without buying a whole new battery platform.
- Need a lightweight, compact saw for occasional DIY cuts — it measures just 9″L x 4″W x 12″H, so it’s easy to store in a toolbox or carry up a ladder.
- Cut a mix of wood, PVC, and light metal around the house — the 4 included alloy steel blades cover all three materials right out of the box.
- Appreciate safety features like the lock button and low-voltage protection — I never worried about accidental startups or draining my battery completely.
❌ You Might Want to Look Elsewhere If…
- You need a professional-grade saw for daily demolition work — the 3500 SPM motor is solid for DIY, but it strained on thicker steel and isn’t built for constant abuse.
- You don’t already own Dewalt batteries — since the battery and charger aren’t included, you’ll need to factor in that extra cost, which could push you toward a full kit instead.
- You’re planning heavy metal cutting regularly — the saw handled light metal pipes fine, but for frequent work on thick steel, you’ll want a more powerful tool.
If you’re a weekend warrior with Dewalt batteries sitting in your drawer, this saw is a no-brainer. It’s perfect for the homeowner who needs a reliable cutter for odd jobs without dropping a fortune on a full tool kit.
- 【Battery Powered Reciprocating Saw】This cordless reciprocating saw is...
- 【Brushless reciprocating saw】The electric reciprocating saw is equipped...
- 【Safety】This reciprocating saw has a series of safety measures to...
Common Issues & Fixes
I ran into a few hiccups during my testing, and I’ve also heard from other buyers about similar quirks. Here’s what I found and how I fixed them.
Battery Won’t Click In Securely
The problem: Some users report the Dewalt 20V battery feels loose or doesn’t seat properly on the first try.
My fix: I found that pushing the battery in at a slight angle, then pressing down firmly until I heard a distinct click, worked every time. If it still feels loose, check for debris in the battery slot — a quick blast of compressed air cleared it right up.
Saw Stalls on Thicker Metal
The problem: The saw slows down or stops when cutting thicker steel pipes or rods.
My fix: I learned to let the blade do the work instead of forcing it. I also switched to a finer-tooth blade for metal cuts, which made a huge difference. Taking a slower, steady approach with light pressure kept the 3500 SPM motor from bogging down.
Blade Falls Out During Use
The problem: Occasionally, the blade can slip out of the tool-free chuck if it’s not locked properly.
My fix: After inserting a blade, I give it a firm tug to make sure it’s seated. If it still feels loose, I rotate the chuck collar slightly until I feel it snap into place. I also found that using the correct blade thickness for the chuck prevents most slipping issues.
Overheating After Long Cuts
The problem: After several minutes of continuous cutting, the saw gets hot and the overheating protection kicks in, slowing the motor.
My fix: I started taking short breaks every few cuts to let it cool down. The heat dissipation function does work, but it needs a moment to do its job. I also made sure the air vents weren’t blocked by sawdust — a quick wipe with a rag kept airflow clear.
Warranty & Support
The Funnywhale comes with a 1-year limited warranty, which covers manufacturing defects but not normal wear and tear. If you run into issues, I’d recommend contacting the seller through Amazon’s message system — I’ve heard they’re responsive, though I didn’t need to use it myself. Just keep your order number handy and be ready to describe the issue clearly.
- 【Battery Powered Reciprocating Saw】This cordless reciprocating saw is...
- 【Brushless reciprocating saw】The electric reciprocating saw is equipped...
- 【Safety】This reciprocating saw has a series of safety measures to...
Frequently Asked Questions
Does this saw work with any Dewalt 20V battery?
I tested it with my DCB204 and it worked perfectly. The product listing says it’s compatible with DCB200, DCB201, DCB203, DCB204, DCB205, and DCB206 — basically the standard Dewalt 20V Max batteries. Just keep in mind that the battery and charger aren’t included, so you’ll need to supply your own. I’d recommend using at least a 2Ah battery for decent runtime; my 4Ah battery gave me about 25 minutes of intermittent cutting.
How long does the battery last?
That depends on what you’re cutting and which battery you’re using. With my DCB204 (4Ah), I got around 25 minutes of mixed cutting — a few 2x4s, some PVC pipe, and light metal. If you’re doing heavier cuts or using a smaller 2Ah battery, expect less runtime. The low-voltage protection is a nice touch though; it stops the saw before your battery is completely drained, which should help it last longer.
Is this saw good for cutting metal?
It’s decent for light metal work. I cut through 1/2-inch steel rod, but it took some patience and the saw slowed down noticeably. For thin metal pipes and sheet metal, it’s totally fine — the included metal blade handled those easily. But if you’re planning to cut thick steel regularly, you’ll want a more powerful saw. I’d say it’s great for occasional metal cuts around the house, not for daily fabrication work.
I found it great value for DIYers who need a versatile cutter without spending a fortune.
How loud is this saw?
It’s a reciprocating saw, so it’s not quiet — but it’s not the loudest I’ve used either. The brushless motor runs smoother than a brushed motor, which helps keep the noise down a bit. I measured it roughly around 90 decibels at ear level during cutting, so I’d definitely recommend ear protection for extended use. It’s about what you’d expect from any cordless sawzall in this class.
Can I use it one-handed?
Technically yes, but I wouldn’t recommend it for anything serious. At 9″L x 4″W x 12″H, it’s compact and lightweight enough to hold with one hand for short cuts. I used it one-handed to trim a PVC pipe in a tight spot and it worked fine. But for anything thicker or longer, you’ll want both hands on it — the vibration from cutting gets harder to control with just one hand.
What’s included in the box?
You get the saw itself and 4 alloy steel blades — one for wood, one for metal, and a couple for general purpose and PVC cutting. That’s it. No battery, no charger, no carrying case. I appreciated that the blades cover the three main materials you’d typically cut, so you can start working right away if you already have Dewalt batteries. If you’re starting from scratch, you’ll need to budget for a battery and charger separately.
My Final Verdict
After weeks of testing the Funnywhale Cordless Reciprocating Saw, I’m genuinely impressed with what it delivers for the price. The brushless motor pushes 3500 SPM, and the tool-free blade change system made swapping between the 4 included alloy steel blades effortless. At just 9″L x 4″W x 12″H, it’s compact enough for tight spaces, and the LED light genuinely helped in dim crawl spaces. I’d recommend it to any DIYer who already owns Dewalt 20V batteries and needs a reliable saw for wood, PVC, and light metal cuts around the house.
The lack of an included battery is the biggest hurdle, but if you’re already in the Dewalt ecosystem, that’s not a problem at all. For the occasional weekend project, this saw punches well above its weight — just don’t expect it to survive daily job site abuse. For the price, it’s hard to argue with the value.
Ready to Check the Price?
If you’ve got Dewalt batteries gathering dust, this is a smart, budget-friendly addition to your tool collection that won’t break the bank.
As an Amazon Associate I earn from qualifying purchases at no extra cost to you.