SUNMAY Cordless Hair Straightener, 0. vs Terviiix Mini Flat Iron Adjustable Temperature,
Updated August 2026 — SUNMAY Cordless Hair Straightener, 0. wins on battery and heating time, Terviiix Mini Flat Iron Adjustable Temperature, wins on price and safety.
The SUNMAY Cordless Hair Straightener offers more versatility and portability, while the Terviiix Mini Flat Iron is a budget-friendly option for short hair.
Why SUNMAY Cordless Hair Straightener, 0. is better
Versatility
Functions as both a straightener and curler
Portability
Cordless design enhances travel convenience
Heating Speed
Heats up in just 20 seconds
Why Terviiix Mini Flat Iron Adjustable Temperature, is better
Price
More affordable at $21.99
Safety Features
Includes 50-minute auto-sleep mode
Targeted Use
Designed specifically for short hair styling
Overall score
Specifications
| Spec | SUNMAY Cordless Hair Straightener, 0. | Terviiix Mini Flat Iron Adjustable Temperature, |
|---|---|---|
| Max Temp | 205°C | 410°F |
| Temperature Settings | 3 | 3 |
| Usage Time | 30 mins | plug-in |
| Voltage | Dual | Dual |
| Curling Capability | Yes | Limited |
Dimension comparison
Overview of SUNMAY Cordless Hair Straightener and Terviiix Mini Flat Iron
The SUNMAY Cordless Hair Straightener is priced at $44.98, while the Terviiix Mini Flat Iron is significantly cheaper at $21.99, making it about 51% less expensive. Both products are designed for travel convenience, but they cater to different styling needs and preferences. The SUNMAY model offers cordless functionality and a dual voltage design, ideal for on-the-go styling, whereas the Terviiix focuses on adjustable temperatures and is particularly suited for short hair.
Design and Portability
Both the SUNMAY and Terviiix flat irons are designed with portability in mind, but they take different approaches. The SUNMAY Cordless Hair Straightener weighs only 0.5 lbs and boasts a compact size that fits easily into a carry bag, making it perfect for travel. It also includes a heat-resistant travel pouch for safe storage. In contrast, the Terviiix Mini Flat Iron measures 7.9 inches and is designed for use on short hair. While it's also lightweight and dual voltage compatible, it lacks the cordless feature that enhances the SUNMAY's portability.
Heating Performance
The SUNMAY Cordless Hair Straightener heats up in just 20 seconds, reaching a maximum temperature of 205°C (approximately 401°F), making it ideal for quick styling sessions. It offers three temperature settings that can be adjusted according to hair type. Meanwhile, the Terviiix Mini Flat Iron has a default temperature of 360°F and allows for adjustments between 320°F and 410°F. Although both options heat up quickly, the SUNMAY's faster heating time may be more appealing for users with time constraints.
Styling Versatility
When it comes to styling versatility, the SUNMAY Cordless Hair Straightener takes the lead as it functions as both a straightener and a curler. This 2-in-1 capability allows users to create straight looks, bouncy curls, and textured waves, making it suitable for various hair types. The Terviiix Mini Flat Iron, on the other hand, is specifically designed for short hair and excels in curling ends and bangs. While it may not have the same range of styling options, it is effective for its intended purpose.
Battery Life and Convenience
The SUNMAY Cordless Hair Straightener includes a built-in 5000mAh battery that provides 20 to 30 minutes of usage time. This battery is rechargeable via a USB-TypeC cable, adding to the convenience for users who need a quick touch-up. However, it’s essential to note that the heating will stop while charging. The Terviiix Mini Flat Iron does not have a battery and relies on being plugged in, which may limit its convenience for users looking for a truly cordless experience.
Safety Features
Safety is a crucial aspect of any styling tool, and both the SUNMAY and Terviiix models come equipped with features designed to protect users and their hair. The SUNMAY straightener has an automatic shut-off feature when charging, ensuring it does not overheat. In comparison, the Terviiix Mini Flat Iron includes a 50-minute auto-sleep mode, which can help prevent accidents if the device is left on. This makes the Terviiix slightly more user-friendly for those who may forget to turn off their tools.
Customer Feedback and Popularity
The SUNMAY Cordless Hair Straightener has a sales rank of 13,219, while the Terviiix Mini Flat Iron ranks higher at 9,276. This indicates that the Terviiix is more popular among consumers, possibly due to its lower price point and functionality for short hair. Customer feedback often highlights the effectiveness of both products, but the Terviiix may appeal more to those seeking budget-friendly options for specific hair types.
Which should you buy?
Choosing between the SUNMAY Cordless Hair Straightener and the Terviiix Mini Flat Iron ultimately depends on your individual needs. If you value portability and versatility with a dual-function styling tool, the SUNMAY model is worth the higher price at $44.98. However, if you are looking for a more budget-friendly option that excels at styling short hair, the Terviiix Mini Flat Iron at $21.99 offers excellent value. Consider your hair type, styling preferences, and budget to make the best choice for your styling needs.

