For most buyers, the DEWALT DCG413B is the best overall cordless angle grinder in this lineup, pairing a brushless motor with a paddle switch and kickback brake. The Milwaukee 2880-20 is a strong alternative for M18 users who want a no-lock paddle switch, while the Makita XAG04Z suits buyers already invested in the LXT platform. The main tradeoffs are battery compatibility, full-size power versus compact handling, and whether a bare tool or a ready-to-use kit makes more sense. Small 3-inch models prioritize access and portability, but they are not direct substitutes for 4-1/2-inch grinders. Read on for the full comparison and guidance on choosing among these cordless angle grinders.
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Key Takeaways
- Platform fit drives the shortlist: DEWALT, Milwaukee, Makita, and RYOBI picks make the most sense when you already own compatible batteries and chargers.
- The DCG413B stands out for safety-focused control: its paddle switch and kickback brake make it the strongest all-around recommendation in this group.
- Premium tool-only models trade convenience for platform quality: Milwaukee, Makita, and DEWALT options may require a separate battery, charger, and compatible discs.
- Included batteries change the value equation: AOBEN and some TEENO kits include batteries and a charger or accessories, while many established-brand models are bare tools.
- Three-inch grinders serve a different job: TEENO‘s compact models are easier to carry and reach into tight spaces, but their smaller discs limit their role compared with 4-1/2-inch grinders.
| cordless angle grinder | Voltage | Motor | Maximum speed | Weight |
|---|---|---|---|---|
| Ryobi R18AG-0 ONE+ 18V Cordles | 18V | — | 9,000 rpm | 2.62 kg |
| TEENO 21V Brushless Cordless A | 21V | Brushless | — | — |
| 4-1/2-Inch Cordless Angle Grin | — | Brushless | — | — |
| SEESII 4-1/2-Inch Cordless Bru | 21V in description; 18 volts in specifications | Brushless | — | 1.8 kg |
| DEWALT DCG413B 20V MAX Brushle | 20 volts | Brushless | — | 3.8 pounds |
| AOBEN 4-1/2-Inch Cordless Angl | 21 volts | Brushless | 9,500 RPM | 4.82 kg |
| RYOBI PCL445B 18V Cordless 4-1 | 18 volts | — | 9,000 RPM | 5.6 pounds |
| DEWALT 20V MAX Brushless 4.5-I | 20 volts | Brushless | 9,000 RPM | Listed as 3.55 lb in description and 4.8 lb in product information |
| TEENO 3-Inch Cordless Angle Gr | 16.8V in description; 120V in specifications | — | 19,500 RPM | — |
| Milwaukee 2880-20 M18 FUEL Bru | 18 volts | Brushless | 8,500 RPM | 5 pounds |
| Milwaukee 2888-20 18V Cordless | 18 V | — | — | — |
| Makita XAG04Z 18V LXT Brushles | 18 V | Brushless | 8,500 RPM | — |
| FULLYEA 4-1/2-Inch Cordless An | — | Brushless | — | — |
| TEENO 3-Inch Cordless Angle Gr | 16.8 V | — | 19,500 RPM | 3.7 lb |
| SINGTIP Cordless Angle Grinder | — | Brushless | — | — |
More Details on Our Top Picks
Ryobi R18AG-0 ONE+ 18V Cordless Angle Grinder
The Ryobi R18AG-0 is the straightforward choice for buyers already invested in the ONE+ battery platform: a compatible pack can power this grinder without adding another battery system. Its 9,000 rpm maximum speed is higher than the DeWalt 20V MAX grinder listed here, but the Ryobi’s product information gives fewer details about controls and safety features, so buyers seeking a clearly specified braking system may prefer the DEWALT DCG413B. At 2.62 kg, it is also heavier than the SEESII’s listed 1.8 kg, a difference that may matter during overhead or extended work. The battery inclusion is not specified, so I’d treat this as a tool-only purchase until confirmed. Its appeal is platform compatibility, not a complete ready-to-work kit.
Pros:- Works with the Ryobi ONE+ battery platform
- Cordless 18V operation
- Maximum speed of 9,000 rpm
- Metal construction
Cons:- Battery inclusion is not specified
- No warranty details are provided in the product information
- At 2.62 kg, it is heavier than the listed SEESII grinder
Best for: Ryobi ONE+ owners who want a compatible grinder for occasional cutting or grinding without adding another battery platform.
Not ideal for: First-time cordless-tool buyers who need a confirmed battery and charger, or users prioritizing a lightweight grinder or clearly documented braking features.
- Power source:Battery powered
- Voltage:18V
- Maximum speed:9,000 rpm
- Material:Metal
- Weight:2.62 kg
- Dimensions:11.81 × 11.81 × 13.78 in
- Battery inclusion:Not specified
- ONE+ platform:Compatible
Our verdict“Choose the Ryobi if you already own ONE+ batteries and can confirm what is included; otherwise, a complete kit such as the SEESII is easier to start with.”
TEENO 21V Brushless Cordless Angle Grinder Kit, 4-1/2″–5″, 3-Speed, with Auto-Brake
The TEENO earns its place as the most ready-to-use package here: it includes two 4.0Ah batteries, a charger, six discs, and a carrying case, while the Ryobi R18AG-0’s battery inclusion is not specified and the DEWALT DCG413B is sold without a battery or charger. Its three speed settings let buyers choose between 3,000, 6,000, and 8,500 RPM, which is more adaptable than a single maximum-speed listing. The brushless motor and auto-brake are paired with soft start, overload protection, and anti-restart circuitry. The tradeoff is uncertainty: runtime and charging time are not supplied, and the included discs may not cover every job. I’d favor it for someone starting without compatible batteries, rather than a buyer already invested in a major tool platform.
Pros:- Includes two 4.0Ah batteries and a fast charger
- Three speed settings from 3,000 to 8,500 RPM
- Accepts 4-1/2-inch and 5-inch discs
- Auto-brake, soft start, overload protection, and anti-restart circuitry
Cons:- Battery runtime and charging time are not specified
- Included accessories are limited to the listed six discs and kit components
- The 21V battery system may not match tools a buyer already owns
Best for: DIYers who need a cordless grinder package with batteries, charger, common disc sizes, and accessories included.
Not ideal for: Owners committed to Ryobi, DEWALT, or another battery platform who would rather buy a bare tool, or users who need confirmed runtime and charging figures.
- Voltage:21V
- Motor:Brushless
- Wattage:800W
- Speed settings:3,000 / 6,000 / 8,500 RPM
- Disc compatibility:4-1/2-inch and 5-inch
- Spindle thread:5/8-inch-11
- Batteries:2 × 21V 4.0Ah lithium-ion
- Included accessories:Fast charger, 2 grinding wheels, 2 cutting discs, 2 flap discs, side handle, wrench, and carrying case
Our verdict“Pick the TEENO for an all-in-one starting kit; platform owners may get a better fit from a compatible bare tool such as the DEWALT DCG413B.”
4-1/2-Inch Cordless Angle Grinder for DeWalt 20V MAX Batteries, Tool Only
This grinder’s main advantage is simple: it is designed for buyers who already have select DeWalt 20V MAX batteries and want to avoid buying another battery and charger. Its brushless motor and three speed settings offer more adjustment than the single maximum speed listed for the Ryobi R18AG-0, while separate cutting and grinding guards make it easier to set up for different jobs. It also includes a side handle and assorted wheels, though the battery and charger are not part of the package. The stated 7,200 rpm maximum is lower than the Ryobi’s 9,000 rpm and the SEESII’s 10,000 rpm, and this model is described for DIY and light-duty work. Check compatibility carefully: it excludes DeWalt DCB6XX batteries.
Pros:- Brushless motor
- Three speed settings for different tasks
- Includes separate grinding and cutting guards
- Soft start and lock-off button
Cons:- Battery and charger are not included
- Not compatible with DeWalt DCB6XX batteries
- 7,200 rpm maximum is below the listed Ryobi and SEESII maximum speeds
Best for: DIY users with a compatible DeWalt 20V MAX battery who want a brushless grinder with adjustable speed and included guards.
Not ideal for: Buyers without compatible batteries, users with DeWalt DCB6XX packs, or workers needing a grinder specified for heavy-duty use.
- Disc size:4-1/2 inches
- Motor:Brushless
- Maximum rotational speed:7,200 rpm
- Speed settings:3
- Battery compatibility:Select DeWalt 20V MAX batteries
- Battery and charger:Not included
- Spindle thread:5/8-11
- Safety features:Soft start, lock-off button, and trigger switch
- Included accessories:Grinding and cutting guards, spare flange set, wrench, side handle, sanding wheels, cutting wheels, and flap discs
Our verdict“This is a sensible accessory purchase for a DIYer with a compatible DeWalt pack, but the TEENO kit is more complete for someone starting from scratch.”
SEESII 4-1/2-Inch Cordless Brushless Angle Grinder, 21V, 3-Speed, 10,000 RPM
Among these bundled grinders, the SEESII stands out for pairing two 4.0Ah batteries and a charger with a listed weight of just 1.8 kg. That makes it a more appealing option for users who value easier handling than the heavier Ryobi R18AG-0, while its 10,000 RPM top setting exceeds both the Ryobi’s 9,000 rpm and the TEENO kit’s 8,500 RPM. Three speeds—5,000, 7,500, and 10,000 RPM—also provide more control across cutting, grinding, and polishing tasks than a single-speed listing. The key caveat is a specification inconsistency: the description calls it 21V, while the specifications list 18 volts. I’d verify the battery and tool labeling before purchase. The included wheels and bag make this more complete than the DEWALT bare tool, but runtime details are absent.
Pros:- Listed weight of 1.8 kg
- Includes two 4.0Ah batteries and a charger
- Three speed settings up to 10,000 RPM
- Side handle can be mounted on either side
Cons:- Voltage is inconsistent across the product information: 21V in the description and 18 volts in the specifications
- Battery runtime and charging time are not specified
- Included wheels may not suit every material or application
Best for: DIYers seeking a relatively light grinder kit with two batteries, adjustable speed, and accessories for varied home projects.
Not ideal for: Buyers who require consistent voltage documentation or verified runtime information before choosing a cordless tool.
- Disc size:4-1/2 inches
- Voltage:21V in description; 18 volts in specifications
- Motor:Brushless
- Speed settings:5,000 / 7,500 / 10,000 RPM
- Wattage:900 watts
- Batteries:Two 4.0Ah batteries
- Weight:1.8 kg
- Included components:Charger, side handle, 4 cutting wheels, 2 flap wheels, and carrying bag
Our verdict“Choose the SEESII for a light, accessory-rich kit if you can confirm its voltage; choose the DEWALT DCG413B instead if documented safety features matter more than included batteries.”
DEWALT DCG413B 20V MAX Brushless Cordless Angle Grinder, 4.5-Inch, Paddle Switch, Kickback Brake, Tool Only
The DCG413B is the most safety-focused choice in this group, with a Kickback Brake, a two-stage trigger, and a wheel brake that stops the disc in an average of two seconds or less. It also requires the trigger to be cycled after a power interruption, adding a deliberate step before restart. Compared with the TEENO and SEESII kits, it is a less complete purchase because the battery and charger are sold separately; its clearest fit is for someone who already owns a compatible 20V MAX pack. Its brushless motor and paddle switch support a familiar, controlled setup, but the stated maximum speed of 3,450 rpm is far below the listed speeds of the Ryobi and SEESII. I’d prioritize its brake and documented safety features over speed range or included accessories, not treat it as the most versatile kit.
Pros:- Brushless motor
- Wheel brake stops in an average of two seconds or less
- Kickback Brake and E-Switch Protection
- Two-stage trigger helps reduce accidental activation
Cons:- Battery and charger are sold separately
- Maximum rotational speed is listed as 3,450 rpm, below the Ryobi and SEESII figures
- No speed settings are listed
Best for: DeWalt 20V MAX owners who value a documented wheel brake, kickback response, and restart protection for routine grinding and cutting.
Not ideal for: Buyers who need batteries and a charger included, or those prioritizing high listed RPM and multiple speed settings.
- Voltage:20 volts
- Disc size:4.5 inches
- Motor:Brushless
- Maximum rotational speed:3,450 rpm
- Switch type:Paddle switch
- Safety features:Kickback Brake, E-Switch Protection, and two-stage trigger
- Brake stopping time:2 seconds or less on average
- Weight:3.8 pounds
- Battery and charger:Sold separately
Our verdict“Choose the DCG413B if you own a compatible DeWalt battery and put braking and restart safeguards ahead of a bundled kit or higher listed speed.”
AOBEN 4-1/2-Inch Cordless Angle Grinder Kit, 21V Brushless, with Two 4.0Ah Batteries and Charger
I’d choose the AOBEN when I want a cordless grinder kit that can start work without a separate battery purchase. Its two 4.0Ah batteries, charger, assorted discs, guards, and case make it a more ready-to-go package than the bare-tool DEWALT DCG408B or Milwaukee 2880-20. Three speed settings offer more control for varied cutting, grinding, sanding, and polishing than a single-speed setup, while the brushless motor reaches 9,500 RPM. That versatility comes with a tradeoff: at a listed 4.82 kg, it is a substantial tool to hold for extended overhead work. Its overload and overheating protection can also pause operation, and the batteries are not compatible with other brands. I’d favor it for a self-contained starter kit, not for buyers already invested in another battery platform.
Pros:- Includes two 4.0Ah batteries and a charger, unlike the DEWALT DCG408B and Milwaukee 2880-20 bare tools.
- Three speed settings give more control across cutting, grinding, sanding, and polishing tasks.
- Brushless motor reaches up to 9,500 RPM.
- Includes assorted discs, two wheel guards, an auxiliary handle, and a carrying case.
Cons:- Listed weight of 4.82 kg makes it a heavy choice for long or overhead sessions.
- Battery packs are not compatible with other brands.
- Overload or overheating protection may temporarily interrupt work.
Best for: DIYers and property owners who need a ready-to-use cordless grinder kit with two batteries, accessories, and variable speed control.
Not ideal for: Buyers already equipped with another brand’s batteries, or anyone prioritizing a lightweight grinder for prolonged overhead work.
- Voltage:21 volts
- Motor:Brushless
- Maximum speed:9,500 RPM
- Speed settings:3
- Disc size:4-1/2 inches
- Battery capacity:Two 4.0Ah batteries included
- Arbor size:7/8 inch
- Weight:4.82 kg
Our verdict“Choose the AOBEN if you want a bundled, multi-battery kit with speed options; skip it if low weight or shared-brand batteries matter more.”
RYOBI PCL445B 18V Cordless 4-1/2-Inch Angle Grinder (Tool Only)
The RYOBI PCL445B makes the most sense for buyers who already own compatible batteries and chargers: as a bare tool, it avoids adding another battery system to the workshop. Its three-position side handle helps adapt grip for different angles, while the spindle lock simplifies wheel changes. The 9,000 RPM motor sits just below the AOBEN’s 9,500 RPM ceiling, but the practical distinction is less about peak speed than about platform fit and handling. A die-cast metal gear case is a useful durability feature for a tool that may see abrasive work. By comparison, the DEWALT DCG408B adds brushless construction and more explicit electronic protection, while the RYOBI keeps the feature set simpler. I’d pass if you need a complete kit or want stronger stated safety features.
Pros:- Uses the RYOBI 18V battery platform, making it a natural add-on for existing ONE+ owners.
- Three-position side handle supports different working angles and grip preferences.
- Spindle lock makes accessory changes more convenient.
- Die-cast metal gear case adds a durable component around the gearing.
Cons:- Battery and charger are sold separately.
- The 9,000 RPM maximum is lower than the AOBEN’s 9,500 RPM rating.
- Bare-tool package offers fewer included features and accessories than the AOBEN kit.
Best for: RYOBI ONE+ users who already have compatible batteries and want a straightforward 4-1/2-inch grinder for occasional cutting and grinding.
Not ideal for: First-time cordless-tool buyers who need a battery and charger, or users seeking brushless construction and multiple stated electronic safeguards.
- Voltage:18 volts
- Maximum speed:9,000 RPM
- Disc size:4-1/2 inches
- Handle positions:3
- Weight:5.6 pounds
- Dimensions:12.53 x 2.75 x 5.46 inches
- Battery and charger:Sold separately
- Included components:Bare tool
Our verdict“Buy the PCL445B as a platform-friendly grinder if you already own RYOBI batteries; choose a kit instead if you need power and accessories included.”
DEWALT 20V MAX Brushless 4.5-Inch Paddle-Switch Angle Grinder (DCG408B), Bare Tool
I’d put the DEWALT DCG408B high on the list for buyers who value electronic protection alongside cutting speed. Its kickback brake, E-Clutch, and overload protection are a more safety-focused feature set than the basic handling controls described for the RYOBI PCL445B. The brushless motor reaches 9,000 RPM and is designed to maintain speed under load, helping the grinder keep working through demanding cuts. It also accepts 4- to 5-inch wheels and includes two guard types, which gives buyers more accessory and setup flexibility than a grinder limited to one listed wheel size. The compromise is that it arrives without a battery or charger, just like the Milwaukee 2880-20, and its listed weight is inconsistent: 3.55 pounds in one description and 4.8 pounds in product information. I’d verify fit and handling expectations before buying.
Pros:- Brushless motor reaches up to 9,000 RPM and is described as maintaining speed under load.
- Kickback brake, E-Clutch, and overload protection add a strong set of electronic safeguards.
- Accepts 4- to 5-inch wheels for more accessory flexibility.
- Includes Type A and Type B guards.
Cons:- Battery and charger are sold separately.
- Listed weight is inconsistent between the description and product information.
- Bare-tool format may be a poor fit for buyers without DEWALT 20V MAX batteries.
Best for: DEWALT 20V MAX users who want a brushless grinder with multiple electronic safeguards and flexibility to use 4- or 5-inch wheels.
Not ideal for: Buyers who need a complete kit or who require a clearly consistent weight specification before choosing a tool for prolonged handheld work.
- Voltage:20 volts
- Motor:Brushless
- Maximum speed:9,000 RPM
- Maximum output:850 MWO
- Wheel compatibility:4 to 5 inches
- Included guards:Type A and Type B
- Weight:Listed as 3.55 lb in description and 4.8 lb in product information
- Battery and charger:Sold separately
Our verdict“Choose the DCG408B if you already own DEWALT batteries and prioritize protection features and wheel-size flexibility over a complete kit.”
TEENO 3-Inch Cordless Angle Grinder, 16.8V, 19,500 RPM, with Two Batteries and Six Discs
The TEENO 3-inch grinder fills a different role from the 4-1/2-inch AOBEN and DEWALT: it is a compact tool for smaller cuts, not a like-for-like replacement for full-size angle grinders. Its 3-inch disc and compact dimensions suit tighter spaces and lighter material, while the claimed 19,500 RPM is far above the larger models’ listed speeds. That high rotational speed does not erase its stated 1/2-inch maximum cutting depth, so I would not choose it for deep cuts or demanding heavy stock. The package includes two batteries, six assorted discs, a charger, and a case, giving it a more complete starting setup than the bare-tool Milwaukee 2880-20. There is a notable specification concern: voltage is listed as 16.8V in the description but 120V in the specifications. I’d seek clarification before relying on that figure.
Pros:- Compact 3-inch format is easier to place in tight spaces than the 4-1/2-inch AOBEN or DEWALT.
- Includes two 2000mAh batteries, a charger, six discs, and a carrying case.
- Two-button start and adjustable guard provide useful safety and setup features.
- Listed 19,500 RPM maximum speed suits its small-disc format.
Cons:- Maximum cutting depth is listed as only 1/2 inch.
- Voltage information conflicts: 16.8V in the description and 120V in the specifications.
- The smaller 3-inch disc is not a direct substitute for the larger wheel capacity of the other grinders here.
Best for: DIYers who need a small cordless grinder for shallow cuts, light grinding, and access in tighter work areas.
Not ideal for: Metalworkers making deep cuts or handling heavier stock, and buyers who need clear, consistent electrical specifications.
- Voltage:16.8V in description; 120V in specifications
- Wattage:350 watts
- Maximum speed:19,500 RPM
- Disc size:3 inches
- Maximum cutting depth:1/2 inch
- Battery capacity:Two 2000mAh batteries included
- Included discs:6 assorted discs
- Dimensions:7.8 x 2 x 3.1 inches
Our verdict“Choose this TEENO for compact, shallow cutting with a bundled kit, but pick a 4-1/2-inch grinder for deeper or heavier work.”
Milwaukee 2880-20 M18 FUEL Brushless Cordless 4-1/2 in. / 5 in. Angle Grinder with No-Lock Paddle Switch (Tool Only)
The Milwaukee 2880-20 is the clearest fit for buyers already invested in M18 batteries who want a brushless grinder that can accept both 4-1/2-inch and 5-inch accessories. Its electronic clutch and overload protection give it a more protection-focused profile than the simpler RYOBI PCL445B, while the anti-vibration side handle is aimed at improving comfort and control during extended work. Its listed 8,500 RPM is below the DEWALT DCG408B’s 9,000 RPM and the AOBEN’s 9,500 RPM, so speed is not its main differentiator in this group. The tradeoff is a tool-only purchase: batteries and a charger are not included, and the 5-pound listed weight may feel demanding during long overhead sessions. I’d favor it for M18 owners who value compatibility and handling features over a ready-to-run kit.
Pros:- Brushless motor supports Milwaukee’s M18 cordless platform.
- Compatible with both 4-1/2-inch and 5-inch grinding accessories.
- Electronic clutch and overload protection add safeguards.
- Anti-vibration side handle is designed to support comfort and control.
Cons:- Battery and charger are not included.
- Maximum speed of 8,500 RPM is lower than the DEWALT DCG408B and AOBEN listings.
- Listed 5-pound weight may be tiring during extended overhead work.
Best for: Milwaukee M18 users who want a brushless grinder compatible with 4-1/2- and 5-inch accessories, plus an anti-vibration handle.
Not ideal for: Buyers without M18 batteries, anyone seeking a complete kit, or users who prioritize higher listed RPM or a lighter tool.
- Voltage:18 volts
- Motor:Brushless
- Maximum speed:8,500 RPM
- Compatible disc sizes:4-1/2 inches and 5 inches
- Spindle:5/8 inch-11
- Weight:5 pounds
- Dimensions:13 x 8.5 x 3.5 inches
- Battery included:No; tool only
Our verdict“Buy the Milwaukee 2880-20 if you have M18 batteries and want a two-size brushless grinder with vibration and protection features.”
Milwaukee 2888-20 18V Cordless Variable-Speed Angle Grinder (Tool Only)
The Milwaukee 2888-20 is the standout for buyers who want to tune wheel speed rather than run a grinder at one fixed pace. Its five settings span 3,500 to 8,500 RPM, giving more control for varied grinding and cutting tasks than the three-speed SINGTIP. A two-second-or-less brake also limits coast-down after releasing the switch, while tool-free guard adjustment and accessory changes make setup less cumbersome. The 4.5- and 5-inch wheel compatibility adds flexibility compared with compact 3-inch grinders such as the TEENO T-3608-USA. The tradeoff is that Milwaukee supplies the tool without a battery, and its 5.4-pound listed weight may feel substantial during extended overhead work. I’d choose it for adaptable speed and quick adjustments, not for a ready-to-run kit.
Pros:- Five speed settings from 3,500 to 8,500 RPM support a wider range of work than three-setting models.
- Brake stops the wheel in two seconds or less.
- Tool-free guard adjustment and accessory changes simplify setup.
- Accepts both 4.5-inch and 5-inch wheels.
Cons:- Battery and charger are not included.
- Listed weight of 5.4 pounds may be tiring for extended overhead use.
Best for: Milwaukee-tool owners who switch between materials or tasks and want five speed settings plus fast wheel braking.
Not ideal for: First-time cordless-grinder buyers without an 18V battery, or anyone prioritizing a lightweight tool for prolonged overhead work.
- Voltage:18 V
- Speed settings:5; 3,500–8,500 RPM
- Wheel size:4.5 in or 5 in
- Brake stop time:2 seconds or less
- Item weight:5.4 lb
- Switch:Paddle switch
- Battery included:Not specified
Our verdict“Choose the Milwaukee 2888-20 if adjustable speed and quick stopping matter more to you than an included battery or a lighter tool.”
Makita XAG04Z 18V LXT Brushless Cordless 4-1/2-Inch / 5-Inch Cut-Off/Angle Grinder, Tool Only
The Makita XAG04Z is a strong fit for buyers who prefer the tool to respond to changing work rather than choose among manual speed settings. Its Automatic Speed Change adjusts speed and torque for the application, while Active Feedback-sensing Technology shuts off the motor if the wheel suddenly stops. That combination gives it a different emphasis from the Milwaukee 2888-20, which offers five user-selected speeds and a stated fast brake. Makita’s brushless motor is designed for efficient operation and longer tool life, and the grinder handles 4.5- and 5-inch wheels for cutting, grinding, and sanding. The main limitation is the bare-tool format: battery and charger are separate. The listed weight of 18.14 g also appears unreliable, so I would not use that figure to judge handling against the Milwaukee’s stated 5.4 pounds.
Pros:- Brushless motor is designed for efficient operation and longer tool life.
- Automatic Speed Change adjusts speed and torque to suit the application.
- Active Feedback-sensing Technology shuts off the motor if the wheel suddenly stops.
- Supports 4.5-inch and 5-inch wheels for multiple task types.
Cons:- Battery and charger are sold separately.
- The listed item weight of 18.14 g appears unreliable, making handling comparisons difficult.
Best for: Makita 18V LXT owners who want automatic speed-and-torque adjustment and motor shutoff if a wheel suddenly stops.
Not ideal for: Buyers seeking a complete starter kit, or shoppers who need dependable published weight information before choosing a grinder.
- Voltage:18 V
- Motor:Brushless
- Maximum speed:8,500 RPM
- Wheel size:4.5 in or 5 in
- Speed control:Automatic Speed Change
- Safety feature:Active Feedback-sensing Technology motor shutoff
- Battery and charger:Sold separately
Our verdict“Pick the Makita XAG04Z if you already own LXT batteries and value automatic adjustment and wheel-stop protection over manual speed selection.”
FULLYEA 4-1/2-Inch Cordless Angle Grinder with Brushless Motor
The FULLYEA FAG402-003 makes the most sense for buyers who want batteries and basic accessories in the box, rather than adding a platform battery to a bare tool. It includes two 21V 4.0Ah batteries, a fast charger, a case, and three cutting wheels; the Milwaukee 2888-20 and Makita XAG04Z, by contrast, are tool-only options. Its brushless motor offers three settings up to 12,000 RPM, a higher stated maximum than either of those grinders, but the speed range is less finely graduated than Milwaukee’s five settings. The rotating guard and dual auxiliary handles support repositioning and two-handed control. A meaningful gap is the missing runtime information: two batteries are useful, but the supplied details do not say how long either lasts or how quickly it charges.
Pros:- Includes two 21V 4.0Ah batteries and a fast charger.
- Brushless motor has three speed settings up to 12,000 RPM.
- Rotating safety guard and dual auxiliary handles support different work positions.
- Includes a case and three cutting wheels.
Cons:- Battery runtime and charging time are not specified.
- Three speed settings offer less adjustment than the Milwaukee 2888-20’s five.
- The included batteries do not match the named Milwaukee or Makita battery platforms.
Best for: Buyers who need a self-contained 4.5-inch grinder kit with two batteries, a charger, and included cutting wheels.
Not ideal for: Users already invested in Milwaukee or Makita battery platforms, or those who need published runtime data or finer speed adjustment.
- Wheel size:4.5 in
- Motor:Brushless
- Speed settings:6,000, 9,000, and 12,000 RPM
- Batteries:Two 21V 4.0Ah batteries
- Included charging equipment:Fast charger
- Included accessories:Three cutting wheels, guard, handles, wrench, and tool case
- Runtime:Not specified
Our verdict“Choose the FULLYEA if you want a bundled battery-and-accessory kit and can accept limited runtime information and only three speed settings.”
TEENO 3-Inch Cordless Angle Grinder Kit with Two Batteries and Six Discs
The TEENO T-3608-USA earns its place by serving a different job from full-size 4.5- and 5-inch grinders: compact cutting and grinding where access is tight. Its 3-inch disc and listed 7.8-inch length make it more manageable in confined areas than the Milwaukee 2888-20, but the smaller wheel limits cutting depth to up to 1/2 inch. The 19,500 RPM maximum is high, though speed alone does not erase that depth limitation. This is also a more complete kit than the tool-only Makita XAG04Z, with two batteries, a charger, six discs, gloves, and a case. I’d treat it as a small-work specialist, not a substitute for a standard 4.5-inch grinder on larger cuts. Runtime and charging time are not provided.
Pros:- Compact 3-inch disc suits work in tight spaces.
- Includes two 16.8V batteries and a charger.
- Kit includes six discs, gloves, a wrench, and a carrying case.
- Two-button safety lock and adjustable guard are included.
Cons:- Maximum cutting depth is limited to 1/2 inch.
- Battery runtime and charging time are not specified.
- The 3-inch disc is smaller than the 4.5- and 5-inch wheels used by the Milwaukee and Makita.
Best for: DIYers and repair workers who need a compact grinder for shallow cuts or metalwork in confined spaces and want batteries and discs included.
Not ideal for: Buyers making deep cuts or seeking one grinder for general full-size 4.5- or 5-inch wheel work.
- Disc size:3 in
- Voltage:16.8 V
- Battery capacity:2,000 mAh each
- Batteries included:2
- Maximum speed:19,500 RPM
- Maximum cutting depth:Up to 1/2 in
- Weight:3.7 lb
- Included accessories:Charger, six discs, wrench, gloves, and carrying case
Our verdict“Choose the TEENO T-3608-USA for confined, shallow-cut work with a bundled kit, but skip it if your jobs need full-size wheel capacity.”
SINGTIP Cordless Angle Grinder for DEWALT 20V MAX Batteries, Tool Only
The SINGTIP 205533 is aimed at buyers who already own DEWALT 20V MAX batteries and want a 4.5-inch grinder without adding another battery system. Its brushless motor has three settings from 6,200 to 8,500 RPM, a narrower stated range than the Milwaukee 2888-20’s five settings beginning at 3,500 RPM. That makes Milwaukee the more adaptable choice for users who want lower-speed options, while SINGTIP keeps the appeal focused on platform compatibility. A dual-position handle and quick spindle lock support repositioning and faster disc changes; the package also includes sanding, cutting, and flap discs. The tradeoff is a tool-only purchase, and it accepts only 4.5-inch discs rather than the Milwaukee’s 4.5- and 5-inch options.
Pros:- Compatible with DEWALT 20V MAX batteries.
- Brushless motor offers three speed settings up to 8,500 RPM.
- Dual-position handle and quick spindle lock support handling and disc changes.
- Includes two sanding discs, two cutting wheels, and two flap discs.
Cons:- Battery is not included.
- Limited to 4.5-inch discs, unlike the Milwaukee 2888-20’s 4.5- and 5-inch compatibility.
- Lowest listed speed is 6,200 RPM, higher than the Milwaukee’s 3,500 RPM low setting.
Best for: DEWALT 20V MAX battery owners who want a brushless 4.5-inch grinder with several speed settings and starter discs.
Not ideal for: Buyers without compatible DEWALT batteries, or those who need 5-inch wheel compatibility or a lower-speed setting.
- Battery compatibility:DEWALT 20V MAX
- Battery included:No
- Motor:Brushless
- Speed settings:6,200, 7,200, and 8,500 RPM
- Disc size:4.5 in
- Spindle:5/8 in-11
- Handle:Dual-position
- Included accessories:Two sanding discs, two cutting wheels, and two flap discs
Our verdict“Pick the SINGTIP if you already own DEWALT 20V MAX batteries and want a 4.5-inch brushless grinder, but choose Milwaukee for broader wheel and speed range.”
How We Picked
I ranked these cordless angle grinders around the decisions that shape day-to-day usefulness: battery-platform fit, disc size, motor type, control and safety features, and whether the listing supplies batteries or only the tool. I gave more weight to clear, buyer-relevant features such as brushless motors, paddle switches, braking systems, and variable-speed control than to headline RPM alone. I also separated 3-inch models from standard 4-1/2-inch grinders because they serve different access and material-removal needs.
The order favors a balanced tool for common cutting and grinding tasks, then gives room to platform-specific premium picks, kit value, and specialized compact options. A bare tool can rank well for an owner of that battery system but is a weaker first purchase for someone starting from scratch. Listings with less established brand or platform information rank lower, not because they cannot suit a buyer, but because compatibility, support, and long-term ownership deserve more scrutiny.
Factors to Consider When Choosing Cordless Angle Grinders
Before choosing a model, match the grinder to the work and the battery system you can actually use. A cordless tool can save setup time and reach work away from an outlet, but battery cost, disc size, and runtime can change the value of the purchase. These factors help distinguish a practical everyday grinder from a kit that only looks complete.
Match the Battery Platform Before Comparing Tools
Start by checking the exact battery platform, not just the voltage printed in a listing. A tool-only grinder can be a sensible addition if you already own compatible packs and a charger, but it may be an expensive first step into a new system. Third-party tools described as compatible with a major brand’s batteries are not automatically equivalent to that brand’s own tool; check the fit, included safeguards, and seller support. Also account for battery age and capacity, since an older or small pack may limit sustained work. If you have no batteries yet, compare the full kit cost and contents rather than judging the grinder alone. Avoid assuming that batteries from different product families fit because their voltage labels look similar.
Choose Disc Size for the Work, Not Just Portability
A 4-1/2-inch grinder is the more versatile starting point for common cutting, grinding, and surface-preparation tasks. Three-inch models are easier to carry and can reach smaller areas, but their discs and working capacity make them a specialized choice rather than a smaller version of a full-size grinder. Think about the largest material and cut you expect to handle, then leave room for the disc’s rated capacity and the tool’s guard. A smaller grinder may reduce bulk overhead, yet it can take longer or fail to suit a job that calls for a larger disc. Check which wheel sizes the tool accepts and whether the needed discs are readily available. Never remove a guard or fit a disc that the tool is not designed to use.
Treat Safety Controls as Part of the Fit
Switch style affects how you hold and stop a grinder, so it deserves attention alongside motor performance. Paddle switches can make it easier to release the control when repositioning, while a lock-on design may suit some longer tasks but calls for different handling. Brakes and kickback-related features can reduce risks in certain situations, but they do not prevent every hazard or replace safe technique. Check the product description for the exact safety feature rather than assuming all brushless models have the same protection. New users should prioritize predictable control, a correctly fitted guard, and a grip they can maintain with both hands. Eye, hearing, and appropriate respiratory protection remain necessary regardless of the tool’s electronics.
Read Battery Runtime Claims in the Context of the Job
Angle grinders can draw heavily on a battery, especially during sustained cutting or when the wheel binds. A higher-capacity pack can reduce interruptions, but it also adds weight and may make overhead or detailed work more tiring. For intermittent cuts and short cleanup tasks, a lighter pack may feel easier to handle; for repeated work, spare charged batteries can matter more than a single large pack. Do not treat a listed RPM as a promise of cutting speed under load. Disc condition, material, pressure, and battery charge all affect how the tool performs. Plan the battery setup around the length and intensity of your jobs, not a single no-load specification.
Compare Complete Kits, Not the Number of Extras
A kit with two batteries, a charger, and discs can be convenient, particularly for a buyer without a compatible cordless platform. Still, accessories only add value when their size, type, and condition suit the work; a bundle of discs does not make an unsuitable grinder more capable. Confirm that the kit includes the guard, handle, wrench, and charger you need, and check which battery capacities are supplied. Established platform tools sold bare can be a better long-term fit when you already own chargers and want to expand a shared system. For a first purchase, price out any missing essentials before choosing a bare tool. This simple comparison prevents a low-friction bundle from turning into several separate purchases.
Frequently Asked Questions
Is a tool-only cordless angle grinder a sensible first purchase?
It can be, but only if you already own a compatible battery and charger or have budgeted for them. The DEWALT, Milwaukee, Makita, and RYOBI bare-tool models make the clearest sense as additions to an existing platform. For a first cordless grinder, compare the complete cost and check whether the package includes a battery, charger, guard, and side handle. Do not assume that a battery from another tool brand will fit, even if the voltage appears similar. A ready-to-use kit may be simpler when you are starting without a battery system.
Should I choose a 3-inch grinder or a 4-1/2-inch model?
Choose a 3-inch grinder when compact size and access to tight areas matter more than broad cutting and grinding capacity. The TEENO 3-inch options are better understood as portable specialty tools, not replacements for the standard-size grinders in this roundup. A 4-1/2-inch model is the more flexible choice for general household, workshop, and jobsite tasks. Before buying, check the disc types and sizes required for your work, since a smaller grinder may not accept the wheels you already own. If you only plan to keep one grinder, the larger format is usually the more versatile starting point.
Do I need a brushless cordless angle grinder?
A brushless motor can be appealing if you expect frequent use, since it avoids replaceable motor brushes and is common among the lineup’s higher-featured platform tools. It does not automatically make every brushless grinder the right choice, though. Battery fit, control features, disc compatibility, and the tool’s role matter just as much. A brushed tool may still suit occasional work, particularly if it fits batteries you already own. Compare the whole tool and ownership setup rather than treating the motor label as a guarantee of better results.
Are battery-compatible third-party grinders a good alternative to brand-name tools?
They may suit buyers seeking a lower-commitment way to use batteries they already have, but compatibility claims deserve careful checking. Confirm the exact battery series, the included safety controls, and whether the package provides the accessories needed to use the grinder properly. A tool that accepts a familiar battery does not necessarily share the original brand’s support, warranty process, or system integration. The DEWALT-battery-compatible and other less-established options are best compared against a brand’s own bare tool, not just against a kit’s included extras. If reliability and service options matter most, staying within your existing tool brand is the more straightforward path.
What matters more for cordless grinding: a larger battery or a lighter tool?
The better choice depends on how long you work and where you hold the grinder. A larger battery can support longer work between swaps, but the added weight may make overhead or precise tasks less comfortable. For brief cuts and occasional touch-ups, a lighter setup can be easier to control and carry. For repeated grinding, spare packs or a higher-capacity battery may reduce stops, though they do not remove the need to manage heat and battery charge. If possible, compare the tool with the battery attached, since that is the weight you will actually handle.
Conclusion
For the broadest mix of control and safety features, I’d start with the DEWALT DCG413B as the best overall pick, especially if you already own DEWALT 20V MAX batteries. The best value depends on what you need in the box: the AOBEN kit is a practical candidate for buyers who want batteries and a charger included, while existing platform owners may get better value from a bare tool. For a best premium choice, compare the Milwaukee 2880-20, Milwaukee 2888-20, and Makita XAG04Z by battery system and preferred control features. Beginners should prioritize a complete, compatible kit and straightforward handling rather than choosing on RPM alone. For specific needs, choose a TEENO 3-inch model for compact access, a variable-speed grinder for tasks that benefit from adjustable speed, or a RYOBI model when you already use ONE+ batteries. Match the tool to your battery platform and work before deciding which features are worth paying for.
