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DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, vs SEESII Cordless Mini Angle Grinder: 3-Inch

Updated July 2026 — DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, wins on power and safety, SEESII Cordless Mini Angle Grinder: 3-Inch wins on weight and price.

The DEWALT FLEXVOLT ADVANTAGE offers superior power and features for heavy-duty tasks, while the SEESII provides a budget-friendly option for lighter work.

Why DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, is better

Power

DEWALT delivers 1,550 max watts compared to SEESII's 210W.

Durability

DEWALT is built for heavy-duty use with advanced safety features.

Battery Compatibility

DEWALT is compatible with FLEXVOLT batteries for enhanced performance.

Why SEESII Cordless Mini Angle Grinder: 3-Inch is better

Price

SEESII is significantly cheaper at $59.99.

Weight

SEESII weighs only 1.85 lbs for easy one-handed operation.

Included Accessories

SEESII comes with multiple cutting and grinding discs.

Overall score

DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder,
85
SEESII Cordless Mini Angle Grinder: 3-Inch
65

Specifications

SpecDEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder,SEESII Cordless Mini Angle Grinder: 3-Inch
Max Watts1550210
RPM900019000
Battery Type20V MAX*21V
Included BatteriesNone2 pcs
Safety FeaturesKickback BrakeOverload Protection

Dimension comparison

DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder,SEESII Cordless Mini Angle Grinder: 3-Inch

Overview of the Products

The DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder is designed for heavy-duty use, while the SEESII Cordless Mini Angle Grinder caters to lighter tasks. The DEWALT grinder is priced at $144.50, making it substantially more expensive than the SEESII, which retails for $59.99. This price difference of about 59% reflects the different target markets and capabilities of each tool.

The DEWALT grinder boasts advanced features such as FLEXVOLT technology, which allows it to achieve up to 54% more power when paired with compatible batteries. In contrast, the SEESII grinder, with its lightweight design and 19000 RPM speed, is focused on portability and ease of use for DIY enthusiasts.

Power and Performance

The DEWALT FLEXVOLT ADVANTAGE grinder delivers robust performance with its brushless motor producing 1,550 max watts and speeds up to 9,000 RPM. This output is tailored for demanding tasks, making it suitable for professionals and serious DIYers.

On the other hand, the SEESII grinder, while less powerful at 210W, offers a high speed of 19,000 RPM. This enables it to handle various materials like metal and wood effectively, albeit within a different scope of work. The performance difference is significant, as the DEWALT is built for heavy-duty applications, whereas the SEESII is ideal for lighter, more casual tasks.

Design and Ergonomics

The SEESII Cordless Mini Angle Grinder is designed for comfort and portability, weighing only 1.85 lbs. This lightweight build allows for easy one-handed operation, making it perfect for extended projects without causing user fatigue.

In contrast, the DEWALT grinder, while not specifically noted for its weight, is built for durability and more demanding jobs. It features a paddle switch and includes advanced safety features like a Kickback Brake and E-CLUTCH system. The design of the DEWALT makes it suitable for professional environments where durability and safety are paramount.

Battery and Runtime

The DEWALT grinder operates on 20V MAX* and FLEXVOLT batteries, which are sold separately. This feature ensures that users can leverage the enhanced power of FLEXVOLT batteries, resulting in significantly more runtime and performance for intensive tasks.

The SEESII grinder comes with two 21V 2.0Ah lithium batteries included in the package, providing ample power for extended use. This makes the SEESII a more convenient option for casual users who prefer an all-in-one solution without the need for separate battery purchases. However, the runtime may not match the DEWALT's capabilities when using higher-performance batteries.

Safety Features

Safety features are critical in power tools, and both the DEWALT and SEESII grinders come equipped with unique safety measures. The DEWALT angle grinder includes a Kickback Brake and E-CLUTCH system, which immediately stops the motor when a bind-up is detected. This enhances user safety during intense grinding tasks.

The SEESII grinder features an enhanced safety system with overheat and overload protection, along with an advanced cooling system. These features ensure safe operation during extended use, making it a reliable choice for users who may not require the industrial-strength safety measures of the DEWALT but still prioritize safety in their DIY projects.

Versatility and Accessories

The DEWALT FLEXVOLT ADVANTAGE grinder is compatible with all DEWALT 20V MAX* and FLEXVOLT batteries, offering versatility for users who may already own DEWALT tools. However, accessories like batteries and chargers are sold separately, which can increase the overall cost for new users.

In contrast, the SEESII grinder package includes various accessories such as cutting and grinding discs, making it a versatile all-in-one solution for DIY enthusiasts. This inclusion of multiple blades caters to various tasks, from concrete to metal, making it ideal for home projects and renovations without needing additional purchases.

Price Comparison

The price difference between the DEWALT FLEXVOLT ADVANTAGE grinder and the SEESII grinder is quite stark. At $144.50, the DEWALT is about 59% more expensive than the SEESII, which is priced at $59.99. This price gap reflects their differing capabilities and intended user base, with the DEWALT targeted at professionals and the SEESII at casual users or DIY enthusiasts.

While the higher price of the DEWALT grinder comes with advanced features and superior performance, the SEESII offers a budget-friendly alternative that still delivers solid performance for lighter tasks. Users must consider their specific needs when determining which price point offers the best value.

Which should you buy?

Choosing between the DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder and the SEESII Cordless Mini Angle Grinder ultimately depends on your intended use. If you require a powerful, durable tool for heavy-duty work, the DEWALT, with its advanced features and high performance, is worth the investment. However, if you are a DIY enthusiast needing a lightweight, portable grinder for occasional tasks, the SEESII offers excellent value at a significantly lower price point. Assess your needs carefully to find the right fit for your projects.