Best Cordless Angle Grinder of 2020 Complete Reviews with Comparisons

By Tool Scout | Angle Grinder Reviews

Best Cordless Angle Grinder

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Angle grinders are one of the essential power tools for any homeowner, handymen or professional contractor. They are perfect for cutting and grinding off excess material at lightning speeds.

With the advancements in battery technology in recent years, you can forget about jumping over cables and running unnecessary extension power cords. Cordless angle grinders are much more practical because they allow you to take your work far away from a power outlet.

So stick around to learn more about the best cordless angle grinders and which cordless grinder is right for your future needs.

Comparison Chart

SKIL AG290202 20V 4-1/2 Inch Cordless Angle Grinder

Ryobi ZRP421 ONE Plus 18V Cordless 4-1/2″ Angle Grinder

Bosch GVS-18V-45 18V Cordless Angle Grinder

Makita XAG20Z 18V LXT BL 4-1/2 Cordless Angle Grinder

Dewalt DCG412B 20V MAX Cordless Angle Grinder

Best Cordless Angle Grinder Reviews

SKIL AG290202 20V 4-1/2 Inch Cordless Angle Grinder

Founded in 1926, Skil is now one of the top power tool manufacturers for cheapskates looking for a real red hot bargain. The company was responsible for some revolutionary patents that have since become industry standards.

The SKIL AG290202 is one of the best cordless angle grinders for those that are searching for a cost-effective cordless grinder that still ticks all the boxes. So if you're the type of sensible character that is more fiscally conscious and would rather spend your hard-earned money on more rewarding things like beer, the AG290202 might be just the cordless angle grinder for you. 

Review

The SKIL AG290202 really is the ideal cordless angle grinder for attempting to tackle and accost an entire legion of home improvement projects. This obnoxious little red & black bundle of battery fuelled joy will eagerly help you finish off any grinding, sanding, sharpening, and polishing works.

The tool comes with a PWRCore 20 amp Lithium battery designed with a special cooling system that prolongs the battery’s lifespan. Now while the PWR Core 20 Lithium Battery technology sounds like its the revolutionary battery technology you've been patiently waiting for, it's not all that spectacular when using SKIL's 2.0Ah battery.

So if you already don't own a SKIL PWR Core 4.0Ah battery variation, we recommend you consider getting one if the SKIL AG290202 is the grinder you do choose.

The AG290202 is equipped with a powerful motor that can produce up to 8500 RPM, which is very impressive for a cordless grinder, and even more impressive when this particular model is considered a budget-friendly model. The overall build quality of the AG290202 is pretty good and we'd deem it more than adequate in terms of durability for withstanding every day DIY jobs. 

At this stage of the article, you're probably wondering, where's the fancy paddle switch and premium quality brushless motor that we've all become accustomed to with cordless angle grinders? Well, if you were pondering just that, you might want to either lower your expectations or scroll a little further down the page. The SKIL AG290202 cordless angle grinder was built for those individuals conducting home improvement projects on a budget.

While it would be great to have all of the above high-tech wizardry incorporated into the AG290202, it's not exactly feasible or logical considering the AG290202's price point. SKIL seems to have found a way to produce quality power tools like the AG290202 while utilizing cost-effective components that fulfill the needs of DIYers who are merely attempting to swiftly complete projects on a budget.

In short, the SKIL AG290202 is a brilliant choice for cash strapped individuals seeking a trustworthy workhorse.

Furthermore, we also like that the AG290202 has a dual function lock-on switch which makes sure that the grinder doesn't start up by accident, so you don't have to worry about possible injuries. The SKIL AG290202 makes use of a slow start safety feature that allows you to ease into every grinding or cutting job and makes sure your results are perfect every time.

The grinder’s got a 3-position side handle you can easily move to be able to reach some tricky area where other tools can't. You can also change the position of the guard, so you get better access to some areas. The AG290202 utilizes a spindle lock that helps you change wheels in a matter of seconds. The grinder also has onboard wrench storage that is houses nicely in the side handle. 

PROS

  • Very cost-effective cordless grinder that is capable of damn near every DIY job   
  • Comfortable 3-position side handle which also neatly stores the on-tool wrench
  • Smart soft start feature that greatly reduces wear & tear on the motor 
  • Very nicely balanced in terms of weight distribution yet feels stout in-hand  
  • Super quick Jump Start™ charger that can bring a flat battery back to life in 5 mins

CONS

  • Not very ideal for heavy-duty construction type works 

Ryobi ONE Plus 18V Cordless Angle Grinder

The Ryobi ZRP421 One Plus 18V cordless angle grinder is an affordable tool compatible with all One+ batteries. It has all of the essential features you'd expect to see in a cordless angle grinder and for a cost-effective alternative, it really does have a tremendous amount of power.

Not only does this budget cordless angle grinder pack a reasonable punch in regards to performance, but it is also extremely resilient. This robust small angle grinder has been enormously popular in recent times, and for a bunch of very good reasons that we'll help highlight. 

Review

The first thing that catches your eye about the Ryobi ZRP421 is that it doesn't catch your eye. It's rather unassuming and one might even consider it the plain Jane of the bunch. Then again, this isn't a looks competition and you certainly can't slice through angle iron or threaded bar without some brute force and mechanical mayhem.

And that's where the Ryobi ZRP421 distinguishes its self and sheds ugly skin by generating up to 6,500 RPM enabling you to make a whole horde of cuts quickly and precisely. The ZRP421 is powered by Ryobi's 18-Volt ONE+ batteries that are actually some of the more dependable lithium batteries on the market.

Now while the specs mentioned here with the Ryobi ZRP421 are not something of legend that will unsuspectingly blow the Cheeto dust off your ungroomed beard with great astonishment, they very respectable for a cordless angle that cost half the price of the premium models available today. 

The Ryobi ZRP421 does work efficiently with all Ryobi One+ batteries, including the P108, which is the highest capacity battery in the set. The ZRP421 also has a solid ergonomic design that provides a comfortable, secure grip, so you won't have to worry about the grinder slipping out of your hands on the job.

The Ryobi ZRP421 is most certainly an ideal cordless angle grinder if you already own other Ryobi One+ cordless tools as you’ll be able to utilize the existing batteries you already own. Otherwise, you'll have to buy the 18V batteries and charger separately. I guess that's where things get messing, and costly, but it seems that's quite the conundrum with any power tool that you purchase as a bare tool.

The last attribute that needs to be discussed with the Ryobi ZRP421, is its weight. It manages to tip the scale at a little more than 6 lbs, so it's a bit heavier than most cordless angle grinders, and we blame most of this additional weight on the 18V One+ battery. While they are a reliable lithium-ion battery from Ryobi, they are a bulky and rather heavy battery.

Apart from all that, the Ryobi ZRP421 makes good use of its comfortable 3-position side handle that is easily removable, and it provides outstanding control in order for you to get the job done.

PROS

  • Solid design and construction with convenient trigger switch   
  • Equipped with a tool-free guard feature so you can easy alter the guard position
  • 3-position comfortable side handle that utilizes Ryobi's GripZone™ overmold 
  • Compatible with Ryobi's One+ battery range
  • Comes with a 3-year manufacturer's warranty 

CONS

  • Not the most powerful angle grinder as it only generates 6,500 RPM

Bosch GVS-18V-45 18V Cordless Angle Grinder

If you have a full rack of power tools in your garage, chances are that you have at least one Bosch tool. The company is a leading name in the industry, and it's behind some of the most highly regarded power tools on the market.

The Bosch GVS-18V-45 18V angle grinder is a superbly constructed cordless grinder with all of the features you could possibly need to power through a plethora of DIY jobs or even heavy-duty construction jobs. 

Review

While not everyone requires the level of craftsmanship in a cordless angle grinder that Bosch has produced with the GVS-18V-45, it is still surely something to marvel at. You immediately gain a lasting impression with the GVS-18V-45 that Bosch is heavily focused on the finer details, and that is abundantly evident as soon as you grasp the comfortable anti-vibration control handle.

Bosch has obtained a reputation for manufacturing high-quality and durable tools that get the job done without any exceptions. Like most other Bosch cordless tools, this angle grinder also comes with Bosch's unique Electronic Cell Protection™ and Electronic Motor Protection™ that prevents overheating and make sure that the tool works for years to come.

The GVS-18V-45 can handle the toughest grinding and cutting jobs without any issues. It's about as stout as any cordless angle grinder you'll find and many professionals make use of this savage 18V grinder to ruthlessly brutalize tough metal materials on a daily basis. The GVS-18V-45 can achieve these rugged feats due to its powerful four-brush motor that pumps out a blistering 10,000 RPM. 

While the Bosch GVS-18V-45 might not make use of a sophisticated brushless motor, the GVS-18V-45 does employ the use of a four-brush motor that has more poles and a larger amount of copper in the motor windings. The end result? A colossal amount of power for a cordless angle grinder that surpasses majority of corded angle grinders in terms of performance.

The Bosch GVS-18V-45 angle grinder is fitted with a burst-resistant wheel guard that provides enhanced safety so you can securely grind and cut for extended periods with confidence. The tool-less quick-change wheel guard and restart protection work together to prevent accidental startups and injuries.

In summary, the Bosch GVS-18V-45 is one of the best cordless angle grinders you could purchase in 2020 and you'll likely own it for a lifetime without a single hiccup. It's an exceedingly powerful cordless grinder and can cope with a range of heavy-duty tasks like cutting metal pipes and ceramic tiles. You really can't go wrong with the GVS-18V-45.

PROS

  • Shockingly powerful 6 amp motor that blasts out a blistering 10,000 RPM
  • Brilliant cutting capacity that has been optimized for metal applications 
  • Super durable design that is fitted with a burst-resistant wheel guard
  • Vastly increased runtime with Bosch's Electronic Cell and Motor Protection™
  • Very much suitable for heavy-duty applications and ideal for tradesmen

CONS

  • Battery and charger not included as this is a tool only option without upgrading

Makita XAG20Z 18V LXT BL 4-1/2 Cordless Angle Grinder

Makita has a loyal legion of fanboys around the globe that wouldn't dream of changing course for another manufacture, and that secretly bugs other tool companies who no doubt strive to acquire some of Makita's shine. Makita's power tools are known far and wide for their impeccable craftsmanship and unparalleled performance.

And that's where we are now on the list of the best cordless angle grinder of 2020. One of their most popular cordless grinders on the market, the Makita XAG20Z, comes out swinging like Mike Tyson after the opening bell and asserts it's dick swinging dominance like no other lithium-ion powered angle grinder. 

Review

It's been said that if you have to tell people you're powerful, you aren't. And that statement definitely holds true with the Makita XAG20Z as you'd never assume that this 18V cordless angle grinder surprisingly churns out over 8,500 RPM. These imposing performance metrics are brought to life by Makita's BL™ Brushless Motor that possesses remarkable efficiency thanks to the brushless motors ability to remove heat under load.

Apart from the outstanding power that the XAG20Z produces, you'll also have greater control while wielding it due to Makita incorporating a variable speed control feature. You will be able to easily adjust the RPM range between 3,000-8,500 via a dial, so you can appropriately tackle a multitude of tasks in complete control.

Now while you could constantly alter the grinders speed manually with the XAG20Z like some sort of prehistoric neanderthal attempting complete a Rubik's Cube blindfolded. Or, you could let technology take the reins and automate this minuscule task with absolute ease.

Makita has encompassed what is called Automatic Speed Change™ technology which magically adjusts the grinders speed and torque during operation. This performance tweak might be deemed unnecessary by some experts, but if you're using an angle grinder daily, a little high-tech voodoo could help take the guesswork out of the equation. That way, you can successfully operate without having to overthink things, just like our neanderthal friends. 

Makita proudly beat their own drum about the electric brake system fitted to the XAG20Z that stops the grinding wheel from spinning in less than two seconds for safety and maximum productivity. They have also made use of what is called Active Feedback Technology (AFT) that will turn the motor off if the wheel gets blocked, so you don't have to worry about it overheating.

Makita has gone above and beyond with the XAG20Z by adding some mesh protective intake covers to minimize any potential debris affecting the motor. Couple that with their very own Star Protection Computer Controls™ system which has been deisnged to protect the brushless motor from overload and excessive discharging, and you've got yourself one immensely resilient grinder.

There are a bunch more features that we could ramble on about with the XAG20Z that have been designed for increased efficiency, including; a 3-stage LED battery indicator, spiral bevel gears, paddle switch, soft start, and more. The Makita XAG20Z 18V Cordless Angle Grinder is a durable, versatile tool for the professional and amateur handyman, that will devour even the toughest of materials with little resistance. 

PROS

  • Powered by Makita's BL™ brushless motor that operates exceedingly efficiently  
  • Rubberized slimline body with soft grip construction that is super comfortable    
  • Anti-restart protection that prevents the motor from unwillingly starting
  • Auto adjusts both speed & torque with Automatic Speed Change™ technology 
  • Equipped with an electric brake that stops the grinding wheel in under 2 seconds 

CONS

  • Not the lightest cordless angle grinder on the market as it weighs 5.7 lbs

Dewalt DCG412B 20V MAX Cordless Angle Grinder

When it comes to power tools, everything Dewalt does seems to turn to gold. Or at least yellow. You know exactly what you're getting when you purchase any Dewalt tool, and their signature design like with the Dewalt DCG412B is now instantly recognizable to both newbie DIYers and longtime tradesmen.

The Dewalt DCG412B 20V MAX Cordless Angle Grinder is literally loaded with highly functional features, yet it still manages to rival many of its competitors in terms of price. That said, where entirely does it stack up in regards to performance with the rest of the grinders we've reviewed here today?

Well, let's find out, shall we...

Review

A lot of cordless grinders on the market attempt replicate the performance of what a corded angle grinder offers, but few, if any, actually attain such a goal. But the Dewalt DCG412B is a cordless grinder that accomplishes such a stupendous triumph with top-notch engineering that makes most corded angle grinders seem inferior in comparison.

We're talking about a cordless grinder that pumps out over 8,000 RPM and is powered by a high capacity 20V 4.0Ah Li-ion battery, that will tirelessly keep cutting and grinder without missing a beat. Working the DCG412B for extended hours at a time is just what it's been engineered for, and the 20V 4.0Ah battery of needs only an hour to recharge completely via Dewalt's 20V fast charger.

The Dewalt DCG412B utilizes a rather unique design in comparison to the other 4-1/2 inch angle grinders on the market. This over-under handle design features a convenient trigger switch with a safety lock-off switch that is cleverly situated right above the trigger. With respect to design and ergonomics, the DCG412B is impeccably assembled like the tail end of a Ferrari Enzo. 

The Dewalt DCG412B is about as heavy-duty as it gets, which is why welders, plumbers, mechanics, craftsmen, and construction workers, regularly use it for their everyday projects. While this is the type of grinder that your average professional contractor will proudly cut, grind and polish with, it's also a cordless grinder that every DIY weekend warrior should aim to own.

The DCG412B comes fitted with a bulky and comfortable 2-position adjustable handle that allows you to attack gritty materials from different angles. It also has a low-profile gearbox head and the gears themselves are engineered entirely out of metal so that mechanical failure is vastly reduced. The DCG412B can be fitted with either a 4-1/2 inch wheel or a 5-inch wheel. This is a feature that very few cordless angle grinders possess, and only further adds to the ridiculous amount of swagger that the DCG412B already showcases.

Like all quality angle grinders, the Dewalt DCG412B makes use of a quick-release spindle lock that allows you to change discs effortlessly with the hassle of fumbling around with pesky Allen Keys or on-tool wrenches. Finally, with the Dewalt DCG412B weighing a mere 4 lbs, it's obviously lightweight enough to transport with ease and is also a pure delight to maneuver in confined spaces. 

PROS

  • Has been specifically designed for more heavy-duty demanding applications 
  • Tool free wheel removal with Dewalt's impressive Quick-Change™ feature
  • Incredibly powerful cordless grinder generating over 8,000 RPM
  • Awesome over-under handle design with handy 2-finger trigger switch  
  • Very versatile grinder that can be used with either 4-1/2" wheel or 5" wheel 

CONS

  • Absolutely nothing to complain about with the Dewalt DCG412B, except the price

Cordless Angle Grinder F.A.Q.

Are Cordless Angle Grinders Any Good?

If you've ever owned any type of cordless grinder, you'll probably forever opt for the cordless option in majority of circumstances. Unless you're attacking a super-dense piece of material that really requires that extra gusto that corded angle grinders offer, you'd unlikely reach for the latter given the choice.

Any decent cordless angle grinder with a brushless motor can generate a substantial amount of torque and speed, with some high-end grinders like the DEWALT DCG413R2 producing up to 9,000 RPM. With that kind of power, it would be far-fetched to encounter and job around the home that you could not successfully complete.

Now while the DEWALT DCG413R2 might be the exception, any brushless angle grinder with over 7,500 RPM should suffice for a multitude of tasks around the home or workshop. Although, if you're a construction worker contemplating going cordless because you're sick and tired of running extension leads, going with something like the DEWALT DCG413R2 might be worthwhile.

What are the Best Angle Grinders?

Whether you're interested in purchasing a cordless grinder or a corded angle grinder, there are a few prerequisites that you should prioritize your purchase around. If you're all about cordless grinders, you should consider opting for angle grinders that utilize brushless motors and larger capacity lithium-ion batteries.

Generally speaking, the more reputable the brand is, the greater the likelihood of success and satisfaction. Why is that? Because the top established brands in the tool industry devote a significant about of their budget into research & development. This gives them the ability to manufacture and test these expensive power tools so the finished product is the well-refined tool you expect and not the future failure that lesser-known brands might deliver to market.

Apart from your specific needs and build-quality of the angle grinders available, you should be pondering the features included and how they will actually benefit you. We recommend you contemplate selecting angle grinders that make use of a paddle switch, easy to rotate wheel guard, lock-on switch, a multi-position ergonomic handle, and a brushless motor if it's of the cordless variety.

What is the Best 4-Inch Angle Grinder?

If you're only looking for the best 4-inch angle grinder where the power source is not a consideration, then the Makita GA4030K 4-inch Angle Grinder would be the recommended tool of choice.

Now you might be wondering, is there any notable difference between the 4-inch and 4-1/2-inch size tool? Well, maybe ask your significant other. While half an inch may not seem like much, it's ultimately the distinction between you getting the job done or not.

When You're After the Best Regardless of Price 

So are we talking 4-1/2-inch grinders of the cordless kind where you're after the absolute best and money is no object? 

If so, then we'd say go for that extra 1/2-inch and grab yourself the DEWALT DCG414T1 Cordless Angle Grinder. The DCG414T1 is powered by DEWALT'S FLEXVOLT battery technology and has damn near every conceivable bell and whistle you'd anticipate a top tier angle grinder would possess.

But, keep in mind, while that additional 1/2-inch that the DEWALT DCG414T1 offers might make you a happy camper, your other half will be anything but content when she see's the credit card statement. In other words, size matters in many mysterious ways, and be prepared to pay one way of the other when purchasing the DEWALT DCG414T1.

FINAL VERDICT

The Dewalt DCG412B 20V MAX Cordless Angle Grinder takes the cake here. It has everything attribute you'd want from a angle grinder and simply outperforms any other cordless grinder in the same price range. Another advantage the DCG412B has over the competing grinders we covered here in this review, is that it allows you to utilize both a 4-1/2 inch and 5-inch wheel. 

You really are getting tremendous value with the DCG412B and it will likely be a power tool you own for a lifetime. 

In Conclusion

So that's a wrap for the best cordless angle grinder of 2020 and we hope that you found the new grinder of your dreams. Now while you could pick any one of these reputable little battery powered critters and get to cutting anything you desire, you should ideally take a moment to consider what is the best grinder for your specified needs.

While we've banged on about fancy features and brute power for the majority of this in-depth review, we tried to objectively analyze all the nuances that highlight each tools practical attributes, so you can make a decision with the utmost confidence. We hope we've helped you here today, and feel free to leave and queries below regarding all things tools. Best of luck. 

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