AOBEN Cordless Angle Grinder 4-1/2 inch, 21V Battery Grinder Kit, Power Electric Cut Off Tool, Brushless Motor, 2x4.0Ah Battery & Charger, for Metal Cutting, Grinding, Polishing vs DEWALT 20V MAX* Angle Grinder Tool Cordless Brushless, 4 1/2 Inch, with Paddle Switch and Kickback Brake, Tool Only (DCG413B)

Price and Value Comparison

The AOBEN cordless angle grinder is about 68% cheaper than the DEWALT model, priced at $79.99 compared to $249.00. This significant price difference reflects a fundamental divergence in target markets: AOBEN offers a budget-friendly kit with batteries and accessories included, while DEWALT positions itself as a premium tool sold only as a tool body. The AOBEN package includes two 4.0Ah batteries, a charger, multiple wheels, guards, and a handle—all in one case—making it a complete solution for under $80. In contrast, DEWALT’s DCG413B requires separate purchase of batteries and chargers, adding substantial cost. For users seeking immediate usability without extra investment, AOBEN delivers far greater value per dollar.

Motor Technology and Performance

Both tools feature brushless motors, which offer longer lifespan, better efficiency, and reduced maintenance compared to traditional brushed motors. However, their performance characteristics differ significantly. The AOBEN grinder provides three adjustable speeds via a control panel, reaching up to 9,500 RPM, allowing versatility across grinding, cutting, and polishing tasks. The DEWALT model emphasizes safety over speed modulation, relying on its electronic kickback brake system instead. While both motors are brushless, the AOBEN’s variable speed capability gives it an edge in adaptability for diverse materials and applications. DEWALT focuses on rapid stopping during pinch or stall events, not on user-adjustable output levels.

Safety Features and User Controls

The DEWALT DCG413B stands out with advanced safety systems absent in the AOBEN model. It features a kickback brake that engages automatically when a bind-up, stall, or pinch event occurs, stopping the wheel in two seconds or less. This electronic brake reduces the risk of injury by minimizing sudden movement. Additionally, DEWALT incorporates E-Switch Protection—a no-volt release function that requires the trigger to be cycled off and back on after power loss—to prevent accidental restarts. The AOBEN lacks any mention of such safety mechanisms, relying instead on physical wheel guards and a standard paddle switch. These features make DEWALT a safer choice for high-risk operations, especially in industrial or heavy-duty environments.

Battery and Runtime Considerations

The AOBEN kit includes two 4.0Ah lithium-ion batteries, offering extended runtime ideal for continuous indoor or outdoor work without cords. This dual-battery setup allows for uninterrupted operation by swapping batteries mid-task. The DEWALT DCG413B, however, is sold as a tool-only unit, meaning batteries and charger must be purchased separately. Although DEWALT uses the same 20V MAX* platform, the absence of included batteries drastically increases total ownership cost. Without battery specs provided, runtime comparisons are impossible, but the AOBEN’s inclusion of two large-capacity batteries gives it a clear advantage in convenience and readiness. Users who prioritize immediate use and long runtimes will find AOBEN more practical.

Included Accessories and Kit Completeness

The AOBEN kit is exceptionally comprehensive, including two 4.0Ah batteries, a charger, an auxiliary handle, two wheel guards (full and half-covered), and six grinding wheels—two each of cutting, grinding, and sanding types—plus a wrench. All components fit into a single storage case, making it ideal for beginners or DIYers needing a ready-to-use solution. The DEWALT DCG413B comes as a tool-only unit with no accessories included. Users must buy batteries, chargers, guards, and wheels separately, increasing both upfront cost and complexity. For those starting from scratch, AOBEN eliminates guesswork and ensures everything needed is present.

Build Quality and Design Focus

While neither product’s build quality is explicitly detailed, their design philosophies diverge clearly. The AOBEN emphasizes portability and ease of use with a compact, handheld form factor and an auxiliary handle for better control. Its universal arbor size (7/8") and spindle lock allow quick wheel changes. The DEWALT model prioritizes durability and professional-grade safety, featuring a two-stage trigger requiring two actions to activate—an anti-slip mechanism designed to prevent accidental starts. This design suits experienced users working in demanding conditions. The AOBEN’s simpler interface may appeal to casual users, while DEWALT’s layered controls cater to professionals seeking maximum control and protection.

Which should you buy?

Choose the AOBEN if you want a complete, affordable, all-in-one solution for metal cutting, grinding, and polishing with minimal setup. At $79.99, it includes two 4.0Ah batteries, multiple wheels, guards, and a handle—making it about 68% cheaper than the DEWALT DCG413B. It’s ideal for hobbyists, DIYers, or occasional users who value convenience and low upfront cost. Opt for the DEWALT DCG413B only if you already own compatible 20V MAX* batteries and prioritize advanced safety features like the kickback brake and E-Switch Protection. Despite its higher price of $249.00, it’s best suited for professionals who demand maximum safety and reliability in high-stress environments.