Cordless angle grinders give DIYers serious power without dragging a cord behind them. The best ones cut, grind, and polish metal or masonry with confidence and control.
Top picks include brushless favorites like the DEWALT 20V MAX, Milwaukee M18 FUEL, and Makita XAG04Z, plus several 4-1/2 to 5 inch kits with batteries, guards, and side handles.
They stand out for strong lithium power, fast electronic brakes, comfy grips, and tool-free guard and wheel changes, making projects faster and safer.
| DEWALT 20V MAX Brushless 4.5″ Cordless Angle Grinder |
| Best Safety Features | Battery Platform / Voltage: 20V MAX (DEWALT), tool only | Motor Type: Brushless motor | Wheel / Disc Size: 4-1/2 inch wheel | VIEW LATEST PRICE | Read Our Analysis |
| Milwaukee M18 FUEL Cordless Brushless Angle Grinder Tool |
| Pro Performance Pick | Battery Platform / Voltage: 18V M18 (Milwaukee), tool only | Motor Type: Brushless motor | Wheel / Disc Size: 4-1/2 in. / 5 in. wheels | VIEW LATEST PRICE | Read Our Analysis |
| DCA 20V Cordless Brushless Angle Grinder with Battery |
| Ready‑To‑Use Kit | Battery Platform / Voltage: 20V proprietary pack, 4.0Ah included | Motor Type: Brushless motor | Wheel / Disc Size: 4-1/2 inch discs and wheels | VIEW LATEST PRICE | Read Our Analysis |
| Cordless 4-1/2″ Brushless Angle Grinder with Batteries |
| High‑Speed Workhorse | Battery Platform / Voltage: 21V proprietary packs, 2×4.0Ah included | Motor Type: Brushless motor | Wheel / Disc Size: 4-1/2 inch class (accessories in kit) | VIEW LATEST PRICE | Read Our Analysis |
| DEWALT DCG412B 20V MAX* Lithium Ion 4-1/2” Grinder (Tool Only) |
| Budget DEWALT Pick | Battery Platform / Voltage: 20V MAX (DEWALT), tool only | Motor Type: Brushed motor (standard) | Wheel / Disc Size: 4-1/2 inch wheel | VIEW LATEST PRICE | Read Our Analysis |
| 5″ Cordless Brushless Angle Grinder Kit with Batteries |
| Most Versatile Kit | Battery Platform / Voltage: Proprietary 18–21V class, 2×6.0Ah included | Motor Type: Brushless motor | Wheel / Disc Size: 5-inch accessories; compatible with 4-1/2 inch | VIEW LATEST PRICE | Read Our Analysis |
| Cordless Brushless 4-1/2″ Angle Grinder (Tool Only) |
| Best DEWALT-Compatible | Battery Platform / Voltage: Compatible with DEWALT 20V MAX batteries, tool only | Motor Type: Brushless motor | Wheel / Disc Size: 4-1/2 inch wheels | VIEW LATEST PRICE | Read Our Analysis |
| Makita XAG04Z 18V Brushless Cordless Angle Grinder |
| Premium 18V Choice | Battery Platform / Voltage: 18V LXT (Makita), tool only | Motor Type: BL Brushless motor | Wheel / Disc Size: 4-1/2 in. / 5 in. wheels | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
DEWALT 20V MAX Brushless 4.5″ Cordless Angle Grinder
Should you want a cordless grinder that feels safe, strong, and easy to trust in your hands, the DEWALT 20V MAX Brushless 4.5″ Cordless Angle Grinder is one of the best places to start. You get a brushless motor, so you never worry about changing brushes or losing power in the middle of a cut. The wheel stops in about two seconds, which feels calming whenever sparks are flying.
You’ll also feel safer with the Kickback Brake and E Switch Protection. The paddle with a two stage trigger makes you slow down just enough to stay in control and protect your fingers.
- Battery Platform / Voltage:20V MAX (DEWALT), tool only
- Motor Type:Brushless motor
- Wheel / Disc Size:4-1/2 inch wheel
- Max RPM (Speed Class):Not specified (high-speed small angle grinder class)
- Included Power (Tool Only vs Kit):Tool only; battery and charger sold separately
- Safety / Protection Features:Kickback Brake, E-Switch Protection (no-volt release), fast electronic brake
- Additional Feature:Rapid 2-second brake
- Additional Feature:Kickback Brake technology
- Additional Feature:E-Switch no-volt release
Milwaukee M18 FUEL Cordless Brushless Angle Grinder Tool
Should you want a compact grinder that still feels tough enough for real work, the Milwaukee M18 FUEL Cordless Brushless Angle Grinder is built for you. You get a 4-1/2 or 5 inch tool that stays light in your hand, yet still feels solid whenever you dig into metal, tile, or rusty bolts.
Because it uses a brushless motor, it runs cooler and lasts longer. The electronic clutch steps in once a wheel binds, helping protect your wrists. Add the anti-vibration handle, no-lock paddle switch, overload protection, and M18 battery compatibility, and you’ve got a safe, reliable grinder for everyday jobs.
- Battery Platform / Voltage:18V M18 (Milwaukee), tool only
- Motor Type:Brushless motor
- Wheel / Disc Size:4-1/2 in. / 5 in. wheels
- Max RPM (Speed Class):Not specified (small angle grinder performance)
- Included Power (Tool Only vs Kit):Tool only; battery and charger sold separately
- Safety / Protection Features:Electronic clutch for kickback, overload protection
- Additional Feature:Electronic kickback clutch
- Additional Feature:Overload motor protection
- Additional Feature:Anti-vibration side handle
DCA 20V Cordless Brushless Angle Grinder with Battery
Power seekers who need cordless freedom will likely feel at home with the DCA 20V Cordless Brushless Angle Grinder with Battery. You get a real brushless motor that pushes up to 8500 RPM, so metal grinding, steel cutting, and descaling feel smooth instead of stressful.
The 4.0Ah battery helps you work most of the day, and the 2 hour fast charge keeps you moving. A live battery display cuts the fear of suddenly running out of juice.
You’ll appreciate the tool free guards, two position handle, left or right hand friendly grip, cooling vents, and the packed kit of discs and accessories.
- Battery Platform / Voltage:20V proprietary pack, 4.0Ah included
- Motor Type:Brushless motor
- Wheel / Disc Size:4-1/2 inch discs and wheels
- Max RPM (Speed Class):Up to 8,500 RPM
- Included Power (Tool Only vs Kit):Kit with 1×4.0Ah battery + charger
- Safety / Protection Features:Tool-free adjustable guard, vents to prevent overheating
- Additional Feature:4.0Ah battery included
- Additional Feature:Real-time battery display
- Additional Feature:Extensive accessory bundle
Cordless 4-1/2″ Brushless Angle Grinder with Batteries
Should you want a compact grinder that still hits like a full-size tool, this Cordless 4-1/2″ Brushless Angle Grinder with Batteries is built for you. You get a brushless motor that spins up to 12,000 RPM, so cuts feel fast and confident. Three speed settings let you match power to the task, from gentle rust removal to aggressive metal cutting.
Because it’s cordless, you can grind, cut tile, or prep surfaces anywhere. Two 21V 4.0Ah batteries keep you working while one charges. A rotating guard, dual non-slip handles, and spindle lock help you stay safe, comfortable, and quick between wheel changes.
- Battery Platform / Voltage:21V proprietary packs, 2×4.0Ah included
- Motor Type:Brushless motor
- Wheel / Disc Size:4-1/2 inch class (accessories in kit)
- Max RPM (Speed Class):Up to 12,000 RPM (3-speed: 6,000 / 9,000 / 12,000)
- Included Power (Tool Only vs Kit):Kit with 2×4.0Ah batteries + fast charger
- Safety / Protection Features:Rotating safety guard, spindle lock, ergonomic non-slip handles
- Additional Feature:12,000 RPM top speed
- Additional Feature:Three-speed power settings
- Additional Feature:Two 4.0Ah batteries
DEWALT DCG412B 20V MAX* Lithium Ion 4-1/2” Grinder (Tool Only)
Should you want a cordless grinder that feels tough enough for jobsite work yet simple enough for weekend projects, the DEWALT DCG412B 20V MAX 4-1/2 inch grinder fits that sweet spot. Its 8,000 rpm motor gives you strong cutting and grinding power, so you can slice through bolts, clean up welds, or shape metal without feeling held back.
You’ll also like how simple it feels in your hands. The 2-finger trigger with a lock-off button makes starting and stopping feel safe and natural. The 2-position side handle, tool-free guard, and Quick-Change Wheel Release let you adjust, swap wheels, and keep moving without hunting for a wrench.
- Battery Platform / Voltage:20V MAX (DEWALT), tool only
- Motor Type:Brushed motor (standard)
- Wheel / Disc Size:4-1/2 inch wheel
- Max RPM (Speed Class):8,000 RPM
- Included Power (Tool Only vs Kit):Tool only; 20V MAX battery sold separately
- Safety / Protection Features:Tool-free guard, lock-off button on trigger
- Additional Feature:Quick-Change wheel release
- Additional Feature:Tool-free adjustable guard
- Additional Feature:2-finger trigger switch
5″ Cordless Brushless Angle Grinder Kit with Batteries
Serious DIYers and busy tradespeople who are tired of weak, short‑lasting tools will really appreciate a 5 inch cordless brushless angle grinder kit with batteries that’s built for power and endurance. You get a brushless motor that hits up to 10,000 RPM, so you can cut steel, tiles, or concrete without it choking. The smart chip keeps the speed steady, and the dial lets you choose from 3,000 to 10,000 RPM for polishing, grinding, or fast cutting.
Two 6.0Ah batteries, a fast charger, comfort grip, strong safety guards, and a huge accessory kit help you stay working, not waiting.
- Battery Platform / Voltage:Proprietary 18–21V class, 2×6.0Ah included
- Motor Type:Brushless motor
- Wheel / Disc Size:5-inch accessories; compatible with 4-1/2 inch
- Max RPM (Speed Class):Up to 10,000 RPM (3,000–10,000 adjustable)
- Included Power (Tool Only vs Kit):Kit with 2×6.0Ah batteries + quick charger
- Safety / Protection Features:Anti-cutting guard plates, safety lock, spindle lock, intelligent battery protection
- Additional Feature:Intelligent speed control chip
- Additional Feature:Two 6.0Ah batteries
- Additional Feature:Large 5″ cutting capacity
Cordless Brushless 4-1/2″ Angle Grinder (Tool Only)
Should you already own Dewalt 20V MAX batteries and want a light, powerful grinder that feels easy to control, this cordless brushless 4-1/2 inch angle grinder fits right into your toolkit. It works with popular Dewalt 20V packs, so you can swap batteries and get moving fast. Since it’s sold as a tool only, you’ll need to use your own battery and wheels.
The brushless motor spins up to 10,000 RPM, giving you strong cutting and grinding power with less noise and longer life. A soft start, fast stop, and quick-adjust guard help you stay in control. You can cut metal, shape stone, smooth concrete, or strip old coatings without feeling weighed down or rushed.
- Battery Platform / Voltage:Compatible with DEWALT 20V MAX batteries, tool only
- Motor Type:Brushless motor
- Wheel / Disc Size:4-1/2 inch wheels
- Max RPM (Speed Class):Up to 10,000 RPM
- Included Power (Tool Only vs Kit):Tool only; no battery or wheels included
- Safety / Protection Features:Protective switch, quick-adjust guard, soft start, power-failure protection, fast stop
- Additional Feature:Compatible with Dewalt 20V
- Additional Feature:1.5-second stop time
- Additional Feature:Soft-start power-up
Makita XAG04Z 18V Brushless Cordless Angle Grinder
In case you want a grinder that feels smart, safe, and powerful in your hands, the Makita XAG04Z 18V Brushless Cordless Angle Grinder is built for you. Its BL brushless motor runs cooler and skips carbon brushes, so you get longer tool life and fewer slowdowns. The motor also adjusts torque and RPM automatically, so it feels like the grinder reads the job with you.
You’ll feel safer, too. Active Feedback-sensing Technology shuts the motor off in the event the wheel suddenly locks. With Automatic Speed Change and the 18V LXT battery system, you get confident control using 4-1/2 or 5 inch wheels.
- Battery Platform / Voltage:18V LXT (Makita), tool only
- Motor Type:BL Brushless motor
- Wheel / Disc Size:4-1/2 in. / 5 in. wheels
- Max RPM (Speed Class):Electronically varied RPM; exact max not specified
- Included Power (Tool Only vs Kit):Tool only; 18V LXT battery and charger sold separately
- Safety / Protection Features:Active Feedback-sensing Technology (AFT), electronic speed/torque management
- Additional Feature:Active Feedback-sensing (AFT)
- Additional Feature:Automatic Speed Change tech
- Additional Feature:Optimized battery run time
Factors to Consider When Choosing a Cordless Angle Grinder
At the moment someone chooses a cordless angle grinder, a few key details quietly decide how easy and safe the tool will feel in daily use. Motor power and RPM, along with battery type and runtime, affect how fast the grinder cuts and how long it keeps working, while safety systems and brake features help protect the user as things get intense. At the same time, wheel size, compatibility, ergonomics, and weight all work together to shape how comfortable the tool feels in the hand and how confidently it handles different jobs.
Motor Power and RPM
Although cordless angle grinders look similar on the outside, the real difference shows up in motor power and RPM. Motor power is often shown in volts and RPM. Higher voltage usually means the grinder can handle tougher cuts without bogging down, which gives users more confidence on demanding jobs.
RPM, or revolutions per minute, tells how fast the wheel spins. High no-load speeds, around 10,000 to 12,000 RPM, cut and grind faster but must match the wheel rating and task. Brushless motors stand out here. They use power more efficiently, reach higher RPMs, and last longer than brushed motors.
Variable speed triggers or dials let users slow things down for delicate work. Electronic clutches and overload protection help keep RPM steady and protect the motor under heavy pressure.
Battery Type and Runtime
Choosing the right battery for a cordless angle grinder can feel a bit stressful, because no one wants a tool that quits halfway through a cut. That is why most people stick with lithium-ion batteries. They hold power well, charge quickly, and give steady performance, even during the grinder works hard.
Battery capacity, measured in ampere-hours, matters a lot. A 5.0 Ah pack usually runs longer than a 2.0 Ah pack, which helps on big projects. Voltage also plays a role. Many grinders use 18V or 20V packs, and higher voltage often keeps the tool stronger under heavy load.
Fast-charging systems reduce waiting time, while real-time battery gauges let users plan jobs and swap packs before power drops.
Safety and Brake Systems
Even before considering power or speed, safety and brake systems on a cordless angle grinder deserve careful attention, because they stand between a simple job and a painful accident. Whenever someone presses the trigger, they need to trust that the tool will also stop once they let go. Fast electronic brakes that stop the wheel in about 1.5 to 2 seconds help prevent slips, cuts, and burns.
Kickback brake systems add another layer of comfort. In case the wheel pinches or stalls, the brake reacts and cuts rotation quickly, so the tool does not twist out of the user’s hands. E-switch protection with no-volt release, spindle locks for safe wheel changes, and strong rotating guards all work together to keep hands, face, and nerves safer.
Wheel Size and Compatibility
During the moment someone looks at cordless angle grinders, wheel size and compatibility quietly decide what the tool can actually do each day. Most cordless models use 4-1/2 inch wheels, which handle common cutting, grinding, and light metal work. This size gives a good balance of control and power for everyday jobs.
Some grinders accept 5 inch or slightly different wheel diameters. That extra range lets someone swap wheels for deeper cuts, faster stock removal, or finer finishing. To keep things safe, the arbor or spindle size, such as 5/8-11 or M14, must match the wheel hub.
Tool-free guards that match the wheel size help here too. They make wheel changes quicker, safer, and smoother, especially during paired with adjustable speed settings.
Ergonomics and Weight
While power and speed often get the spotlight, ergonomics and weight quietly decide how enjoyable a cordless angle grinder feels in real use. At a tool fits the hand well, the work feels smoother and less stressful on the body.
Comfort often starts with the grip. Rubber overmolds can cut vibration up to 35 percent, so hands tingle less and stay steadier during long sessions. Balanced weight distribution also matters, because it lets the user guide the grinder instead of fighting it.
Auxiliary side handles add control and reduce arm fatigue, and adjustable handles help both left and right handed users feel natural. Lightweight brushless motors and compact, well placed motors make the grinder easier to hold in tight, awkward spaces.
Accessories and Value
A grinder can feel great in the hand, but it only becomes truly helpful provided it comes with the right accessories and real value for the price. Once someone opens the box, they should be ready to work, not rush back to the store. Kits that include cutting discs, grinding wheels, and sanding pads let a user move between metal, masonry, and surface prep with less stress.
Auxiliary handles and solid guards add comfort and safety, while tool-free adjustable guards and quick-release wheels make changes faster and less frustrating. A kit that includes a matching battery and charger usually saves money and avoids compatibility problems. A sturdy case, clear manual, and responsive customer support can make the tool feel reliable instead of risky.
