Guide to the Best Cordless Grinder With Battery

Best Cordless Grinder

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Table of Contents

Whether you have to grind welds or cut exhaust pipes, you need a good angle grinder. I have researched and made a list of the best cordless grinder. 

My top pick is Makita XAG04Z. But there are five more grinders that can help you with the task in the most seamless way. They are divided as power, brush, premium choice, budget, and speed with their special features. 

There is also a buying guide in the end. Don’t miss knowing the basic terms that can help you choose the perfect tool.

Let’s start.

Best Overall: Makita XAG04Z

Makita XAG04Z Cut-off-angle grinder

This grinder is a great choice that comes with incredible features. This Makita angle grinder has a brushless motor. It extracts carbon brushes, allowing it to run cooler and more efficiently for longer life. The brushless motor is electronically efficient and productive. It helps maximize battery power, resulting in up to 50% more run time per charge. An electronically regulated brushless motor optimally utilizes energy. That’s to meet torque and higher RPM to adjust application demands.

Features of Makita XAG04Z 18V LXT Lithium-Ion Brushless Cordless 4-1/2” / 5″ Cut-Off/Angle Grinder

  • Disc Diameter: 4-½ to 5 inches
  • Battery Voltage: 18V
  • Battery Size: 5.0 Ah
  • Max Rotations: 8500 RPM
  • Weight: 5.6 lbs

What I liked about Makita XAG04Z?

A feature that makes the Makita tools unique is its automatic speed shift technology. It optimizes performance by adjusting speed and torque during operation. Also, while operating the blade suddenly stops or gets stuck. Here, the active feedback-sensing technology (AFT) turns the motor off. While working you will feel less vibration thanks to its soft grip that is made up of rubber. The best part is that it is not very heavy. 

What I didn’t like about Makita XAG04Z?

The battery gets used up pretty fast. So, you have to keep charging it frequently to get the job done.


  • Extended battery life
  • Brushless angle grinder motor
  • Rubberized comfortable handle
  • Smooth start


  • The battery and charger have to be bought separately

Who can use Makita XAG04Z 18V LXT Lithium-Ion Brushless Cordless 4-1/2” / 5″ Cut-Off/Angle Grinder

This best Cordless grinders is a versatile utility and a good choice. The disc changing is easy. Moreover, you can switch the handle sides too or even remove it. In addition, it can fit in any discs. Plus, it is neither heavy nor noisy. So, whether you’re an expert in a small garage or a newcomer to the field you can use it with ease.

Best Powerful: Bosch GWS18V-45

Bosch GWS18V-bare-tool-cordless-angle-grinder

This one has a compact size. It is a portable grinder with an efficient performance is what we all want, and this Bosch device exactly facilitates that. It has a speed of 10000 RPM without any load. You don’t need to be tech-savvy to get this tool working. It has an easy design and body. Although it doesn’t have a brushless motor, the brand ensures durability.

Features of Bosch GWS18V-45 18V 4-1/2 In. Angle Grinder

  • Disc Diameter: 4-½ inches
  • Battery Voltage: 18V
  • Battery Size: 2.6 Ah
  • Max Rotations: 0 to 10000 RPM
  • Weight: 4 lbs

What I liked about Bosch GWS18V-45?

My absolute favorite part is that it comes with restart protection and a wheel guard. This mechanism shuts the power supply to the device as soon as the battery is dismantled. When you reconnect the battery you have to first switch off the machine and then start it. It also has a slide switch that allows you to work for longer hours. It is pretty much an all-rounder tool that can cut and grind various materials. And, it is so powerful that you really do have to press on it a little to slow it down. 

What I didn’t like about Bosch GWS18V-45?

You will have to scratch your head a little with the guard adjustment. It’s a little tricky. You may not be able to get the desired angle. And, it comes as a bare tool. So, you have to buy the battery separately.


  • Long battery life
  • Efficient and powerful tools
  • Vibration control ergonomic design grip
  • Easy tool swapping


  • Guard adjustment is tricky
  • The battery has to be bought separately

Who can use Bosch GWS18V-45 18V 4-1/2 In. Angle Grinder

The guard adjustment is not very good. So, unless you are a professional, you would find it hard to make specific turns. I would recommend it for people who have at least some knowledge or experience in using this tool. But, if you are an amateur, I would ask you to try this out on things that wouldn’t need incredible accuracy. Once you get a hang of using the tool, this one is a beast with a lot of power.

Best Premium Choice: Metabo WPB 18 LTX 115 BL

Metabo 18V Angle grinder ion battery

On this list of the best cordless grinders, Metabo offers a standard and efficient execution. It is produced in Germany and features a 4 ½ inch grinding disk with a brushless motor that gives you 9,000 rotations per minute. It facilitates quick and easy scraping or cutting of material.

Features of Metabo 18V 4-1/2″ Angle Grinder 5.5Ah Kit

  • Disc Diameter: 4-½ inches
  • Battery Voltage: 18V
  • Battery Size: 5.5 Ah
  • Max Rotations: 9000 RPM
  • Weight: 5.7 lbs

What I liked about Metabo WPB 18 LTX 115 BL?

The interesting aspect is that the assembly systems can be manual, hybrid, or fully automated. Also, to tackle battery heat-up issues, the tool has air-cooled batteries that do not require a cooldown time before being placed in the device. The battery pack can rotate at an angle of 360 degrees, so it does not bother you while working. I liked the crash protection circuit the most! It trips before you could burn it into ash. Moreover, it has an excellent weight balance. I could simply get it into position by spinning it into the air. 

What I didn’t like about Metabo WPB 18 LTX 115 BL?

The thing that I did not like about this tool is that it has a spindle wingnut and not the regular nut. So, it becomes very hard to disengage.


  • Quick brake wheel
  • Prolonged battery endurance
  • Air-cooled batteries that can rotate
  • Agile lock nut


  • Spindle wingnut is tough to disengage

Who can use Metabo 18V 4-1/2″ Angle Grinder 5.5Ah Kit

Due to its high-end performance, it would be a great investment for professional contractors. It brings the WOW factor because of its speed and strength. Indeed a premium choice I would say. 

Best Brushed: PORTER-CABLE PCC761B


This porter cable tool comes with a powerful motor that spins at a speed of 8500 RPM. It is equipped with a spindle lock that allows you to replace a wheel effortlessly. Yet, it lacks torque that is required to cut thick metal plates. Overall, this is a decent tool at a low price with long lasting performance.

Features of PORTER-CABLE 20V MAX Angle Grinder Tool, 4-1/2-Inch

  • Disc Diameter: 4-½ inches
  • Battery Voltage: 20V Max
  • Battery Size: 4.0 Ah
  • Max Rotations: 8500 RPM
  • Weight: 6.75 lbs

What I liked about PORTER-CABLE PCC761B?

The handle of this tool is the reason it stands out; it is flexible and ergonomic and can be held in 3 different positions. Another thoughtful feature is a handle guard that prevents any accidental hitting on your hand when the machine starts. It is very fast in its category of brushed grinder. And the most salient features that I wish to highlight are that it is lightweight and powerful. 

What I didn’t like about PORTER-CABLE PCC761B?

This one also does not have a battery or a charger. So, you have to purchase it separately. The tool is heavy but you can manage to lift it. Moreover, there is no safety lock switch. So, it either stays on or off. And, the guard is not very firm and might not last for a long time.


  • Reasonably priced
  • Side handle that can be adjusted
  • Simple to use
  • Good performance


  • Switch is trigger type
  • No battery and charger included
  • Heavy
  • Flimsy guard

Who can use PORTER-CABLE 20V MAX Angle Grinder Tool, 4-1/2-Inch

If you’re someone who needs an angle grinder on a regular basis, this tool is your go-to. You can remove leaf springs shackles, cut off lug nuts or even remove rusted bolts with this one. If you are grinding off thick paint, just put a little pressure. It will chew it off without overheating or power loss. 

Best Budget: Ryobi P421


You can use the Ryobi P421  perfectly for metalsmithing or house repairs. The rubber grip makes it easy to handle even when your hands are greasy or oily. This device is also compatible with Ryobi battery cells from the One+ Lithium-Ion series as well as older NiCad models.

Features of Ryobi P421 6500 RPM 4 1/2 Inch 18-Volt One+ Lithium Ion-Powered Angle Grinder

  • Disc Diameter: 4-½ inches
  • Battery Voltage: 18V 
  • Battery Size: 2.0 Ah
  • Max Rotations: 6500 RPM
  • Weight: 4.8 lbs

What I liked about Ryobi P421?

The unique feature is that the side handle can be adjusted to three distinct positions. And, the triggered handle rotates at an angle of 90 degrees, allowing you to use this tool just about anywhere you need to scrape. An onboard pin wrench assists for easy replacements of grinder discs. Also, this tool is very strong. Plus, the handle holds the disc wrench when you are not changing discs making it very easy and convenient. Yes, it holds the spanner.  

What I didn’t like about Ryobi P421?

The main downside is that the trigger is not safe. You can accidentally turn it on. You can use a 2 ah power battery. But, that wouldn’t last longer for heavy projects. You need at least 4 ah ones. However, that makes the tool heavier. Also, since it has a brushed motor, it spins slowly.


  • Lightweight
  • Battery package compatible with all Ryobi ONE+ equipment,
  • Replacement of wheels is quick and easy.
  • Very inexpensive


  • Brushed Motor
  • Can easily turn on the tool

Who can Ryobi P421 6500 RPM 4 1/2 Inch 18-Volt One+ Lithium Ion-Powered Angle Grinder

This tool is very convenient. Whether it is changing the disc mechanism or the batteries, nothing is challenging while using this one. If you are an amateur planning to do small tasks and need a portable tool, go for this one. Moreover, if you are an experienced contractor and need to have a convenient or handy tool, Ryobi P421 wouldn’t go wrong. 

Best Speed: DeWALT DCG413R2


The prime feature of this grinder is that it is brushless producing 9000 RPM. So, no need to replace the brush after extensive use. It has powerful and emergency brakes that stop the machine wheel in about 2 seconds. This DeWalt grinder is the perfect precedent for when quality meets performance. It has discs of 4.5 inches that offer effective cutting and scraping.

Features of DEWALT 20V MAX Angle Grinder Tool Kit, 4-1/2-Inch, Paddle Switch with Brake (DCG413R2)

  • Disc Diameter: 4-½ inches
  • Battery Voltage: 20V 
  • Battery Size: 6.0 Ah
  • Max Rotations: 9000 RPM
  • Weight: 3.75 lbs

What I liked about DeWALT DCG413R2?

The reset feature is an advantage if you have a power outage. All you have to do is turn it off, then on, and get back to work. Plus, it comes with a 2 step starter switch. So, you do not end up accidentally starting the device. In awe of the security features. The paddle throttle is really well built. Plus, the discs can also be easily changed. Even the 6 amp batteries would be worth the woodwork. Despite being cordless it has lots of power. 

What I didn’t like about DeWALT DCG413R2?

There are not many disadvantages to talk about this tool. However, it is slightly heavy and pretty expensive. 


  • Battery and charger included
  • An item of quality and longevity
  • Switch protection
  • Smooth functioning
  • Brushless with 9000 RPM amp motor


  • Very expensive
  • Heavy

Who can use DEWALT 20V MAX Angle Grinder Tool Kit, 4-1/2-Inch, Paddle Switch with Brake (DCG413R2)?

This is another versatile product that contributes greatly to either specialists or homeowners. The paddle switch is great. Also, the on/off switch would seem to be different from the regular cordless grinders. But you would learn in no time. It can be a go-to tool for construction workers who are tired of long cables. The 6 amp batteries also can help you do medium duty tasks easily. 

My Verdict

These are some of the best cordless grinders, but if I had to choose one from them, it would be the first one, Makita XAG04Z. This versatile yet essential tool has an excellent battery and offers beneficial features and utility.. 

Further, it has up-to-date features like the brushless motor, good quality design, long run time, and high rotations per minute. And all these features make it the best cordless grinder. My final  advice is to select one that meets all your needs, therefore research well before making your final decision.

Buying Guide For The Best Cordless Grinder

Best Cordless Grinder Buying Guide

There are several characteristics of a cordless grinder that you should examine. To get the most out of your purchase, make sure to properly evaluate your needs and budget first. Then, prioritize what is most important to you and begin with your buying journey. 

For you I have listed a few things to consider while choosing the best cordless grinder.

Power Of The Grinder

Angle grinders come in a variety of voltages, amp ratings, and wattages. While focusing on current, the power output for a grinder with a rating between 115 and 230 volts AC and a wattage range of 500 to 2,500 watts is recommended.

A lighter angle grinder comes with some trade-offs, such as a less powerful motor. You receive a smaller motor with a more compact cordless angle grinder, which means you can struggle in a high-demand environment. 

The best cordless grinders should be able to reach up to 8500 RPM at least.

Disc Size

There are a variety of disc sizes varying from small to big. 4-1/2 inch, 5 inch, 6 inch, 7 inches, and 9 inches discs are standard sizes. The size of the Angle grinder disc influences how large of a piece it can cut. 

For many common tasks, a small angle grinder with fewer than 7 inches disc size is perfect. A larger disc size is more effective for larger surfaces and deeper cuts. According to numerous professionals, the best cordless grinder should be able to fit larger disc sizes. And, I also think the same after working with it.

Operating Speed Ratings

The Majority of the best cordless grinders are extremely powerful. The unit’s discs rotate at a rate of 5000-10,000 revolutions per minute (RPM). They are highly efficient in applications but you should handle with care. 

Battery Life

All the best cordless grinders, large or small, are powered by a battery. Each manufacturer has its own set of batteries, and some even provide many variations to pick from. For the longest battery life, we recommend buying the largest battery the manufacturer offers. A larger battery, on the other hand, also means a heavier tool.

Instead, you may just purchase extra batteries and replace your dead one with a fully charged one. If at all feasible, buy tools from the same brand so that the battery packs can be substituted.


The best cordless grinder and power tool should provide high performance. They should also be easy to handle (overall, it should be well balanced). All good cordless angle grinders are supposed to be able to provide good grip and stability irrespective of their size, weight, or length.

However, when using an angle grinder for polishing some focus is required since the rotary motion might burn the surface.

Select the lighter cordless angle grinder options if you want a tool that will be carried around a lot. Try a lightweight tool if you’ll be grinding while holding it above your head. On the other hand, If you plan on grinding harder materials like cement or marble, heavier choices may greatly help put some weight on the head.

Ease and Convenience to Use

It’s not only about grinding when you use the tool. You may need to replace a wheel, relocate protection, or reposition the handle from time to time. When shopping for the best cordless grinder, look for one that does not require the use of any equipment to change the parts or components.

Fortunately for you, most of the cordless grinders now have some style of tool-free system. Just try to steer clear from the older ones that required a special tool to disassemble. The upper handle is in a similar situation. 

The handle can usually be found in three positions: left, right, and top. Some types, however, have fixed handles that cannot be changed. Such tools lack flexibility and might not be the best cordless grinder in terms of comfort and ease of use.

Safety features

It is crucial to understand that safety features are equally important as any other features. 

For example, electric kickback brake, soft start, automatic shutdown, kickback control. 

Keep in mind that not all manufacturers have the same set of safety features. So, look for such features while shopping for the best cordless grinder. You won’t get all of the best features in a single tool, especially the cheaper ones.

Also, I would recommend using personal protective equipment always while using the grinder. For instance, get leather aprons, gloves, ear protection, masks, helmets and goggles. Eye protection is a must to have. Read more about this in our basic guide for operating an angle grinder.


Now, you are fully ready to make your purchase. In my opinion, Makita XAG04Z is the best choice. However, you can pick from the remaining options for your task. We hope that you found the right brand after reading these reviews. If you enjoyed this guide, and have made a decision to add a cordless angle grinder to your toolbox, please share it on Facebook and Twitter.

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