Aiderar 4-1/2" Cordless Angle Grinder Tool, vs AOBEN Cordless Angle Grinder 4-1/
Updated July 2026 — AOBEN Cordless Angle Grinder 4-1/ leads on speed and price.
The Aiderar offers a more budget-friendly option, while the AOBEN provides a complete kit with better power and accessories.
Why Aiderar 4-1/2" Cordless Angle Grinder Tool, is better
Lower Price
Aiderar is $20 cheaper than AOBEN.
Compatibility
Aiderar is compatible with existing DeWalt batteries.
Lightweight
Aiderar is more compact and easier to handle.
Why AOBEN Cordless Angle Grinder 4-1/ is better
Included Accessories
AOBEN comes with two batteries and a charger.
Higher RPM
AOBEN has a maximum speed of 9,500 RPM.
Longer Runtime
AOBEN's two batteries provide extended operational time.
Overall score
Specifications
| Spec | Aiderar 4-1/2" Cordless Angle Grinder Tool, | AOBEN Cordless Angle Grinder 4-1/ |
|---|---|---|
| Motor Type | Brushless | Brushless |
| Speed Settings | 3 | 3 |
| Battery Included | No | Yes |
| Max RPM | 8500 | 9500 |
| Weight | 5 lbs | 5.5 lbs |
Dimension comparison
Overview of the Aiderar and AOBEN Angle Grinders
The Aiderar 4-1/2" Cordless Angle Grinder and the AOBEN Cordless Angle Grinder are both solid choices in the power tool market, but they cater to slightly different needs. The Aiderar is priced at $59.99, while the AOBEN comes in at $79.99, making the Aiderar about 25% cheaper. This price difference reflects their respective features and included accessories.
Power and Motor Performance
When it comes to motor performance, both grinders utilize brushless technology, which enhances their efficiency and longevity. The Aiderar's brushless motor is designed for use with DeWalt 20V MAX batteries, ensuring consistent power and extended runtime without the hassle of carbon brush replacements. The AOBEN, on the other hand, operates on a 21V battery, offering a maximum speed of 9,500 RPM, which can be advantageous for quick cutting and grinding tasks. This difference in motor specifications indicates that the AOBEN might provide a bit more power for demanding jobs.
Battery and Runtime
Battery performance is crucial for cordless tools, and both products offer impressive capabilities. The Aiderar is a bare tool, meaning it does not include a battery or charger, which can be a downside for users who do not already own compatible DeWalt batteries. In contrast, the AOBEN comes with two 4.0Ah batteries, ensuring longer run times and eliminating the need for separate purchases. The inclusion of two batteries with the AOBEN provides better value for users who require extended operational time without frequent recharging.
Design and Ergonomics
Both grinders are designed with user comfort in mind, but they have distinct ergonomic features. The Aiderar includes a variable-speed trigger and soft start technology, allowing for a smooth and controlled operation, which is especially beneficial when starting work at heights or in awkward positions. The AOBEN also emphasizes comfort with its compact design and auxiliary handle, which improves control during use. However, Aiderar’s soft start feature could be a decisive factor for users concerned about jerky movements during operation.
Safety Features
Safety is paramount in power tools, and both grinders come equipped with safety guards. The Aiderar features two rugged metal safety guards—one standard for grinding and a half-guard for cutting—allowing users to switch tasks quickly and safely. Similarly, the AOBEN includes two protective wheel guards, which serve the same purpose. While both models offer comparable safety features, Aiderar’s focus on task versatility may appeal to users who require quick transitions between grinding and cutting tasks.
Versatility and Applications
Both grinders are designed for multiple applications, but the AOBEN's performance specifications suggest a slight edge in versatility. The Aiderar provides three-speed settings tailored for various tasks, from light sanding to heavy-duty metal cutting. The AOBEN matches this with three adjustable speeds and a maximum RPM of 9,500, making it suitable for a wider range of applications, including grinding and cutting of metal, tile, and steel. Users seeking a tool for diverse tasks might find the AOBEN more suited to their needs.
Pricing and Value
Price is a critical factor for any buyer, and the Aiderar is priced at $59.99, positioning it as a more budget-friendly option compared to the AOBEN, which is priced at $79.99. This nearly $20 price gap makes the Aiderar about 25% less expensive. However, potential buyers should consider the value of the included accessories with the AOBEN, such as the two batteries and charger, which enhance its overall value proposition. For users who prioritize having a complete kit out of the box, the AOBEN may represent better value despite its higher price.
Which should you buy?
In conclusion, the choice between the Aiderar and the AOBEN largely depends on specific user needs. If you are looking for a more affordable option and already own compatible batteries, the Aiderar 4-1/2" Cordless Angle Grinder offers great performance at a lower price. However, if you desire a complete kit with included batteries and a bit more power, the AOBEN Cordless Angle Grinder could be the better investment. Ultimately, consider your existing tools and intended use to determine which grinder aligns best with your requirements.

