TH28 Magnetic Phone Cooler Review: A Powerful Smartphone Cooler

The TH28 Magnetic Phone Cooler is designed for one purpose: to extract heat from a phone as efficiently as possible. And on that front, it delivers.

This magnetic phone cooler combines strong cooling power, a large contact plate, a useful onboard display, and better accessories than you usually get at this price level. Of course, it is not 100% perfect, like max mode is loud (Actually, L1, L2, L3, Ai mode are enough to use, this Max mode is rarely used).

If you want a mobile gaming cooler that focuses on raw performance more than refinement, the TH28 Magnetic Phone Cooler is easy to take seriously. You can follow us to learn more about it with our real test below.

TH28 Magnetic Phone Cooler at a Glance

The TH28 Magnetic Phone Cooler is aimed at gamers, live streamers, power users, and anyone dealing with thermal throttling during long sessions. It supports magnetic attachment, includes a clamp in the box, and gives you several power modes for different use cases.

The headline features are simple:

• strong cooling in L1, L2, L3 mode and Ai mode
• very aggressive cooling in 100% power mode
• a large flat contact plate
• removable fan cover for easier cleaning
• onboard display for power and temperature readouts
• premium bundled accessories, especially the braided USB-C to USB-C cable

It's not perfect, but it's clearly built for users who prioritize cooling performance over looks or frills.

Unboxing: Better Accessories Than Expected

The retail box is fine, but it does not make a premium first impression. It looks more basic than some higher-end coolers, and the packaging does not really hint at how capable the TH28 Magnetic Phone Cooler feels once you open it.

Inside the box, things get better.

You get:

• The TH28 Magnetic Phone Cooler
• User manuals
• A clamp attachment
• A braided USB-C to USB-C power cable
• A metal plate for non-magnetic phones

The accessory bundle is one of the TH28 Magnetic Phone Cooler's strongest points.

Build Quality and Design

The TH28 has a bold, aggressive design. It is not subtle. If you like gaming accessories that look mechanical and performance-driven, this cooler will probably appeal to you. The quality of the TH28 phone cooler accessories is strongest in the early wins. It clearly impressed me with the quality of the clamp, braided cable, and the overall feel of the included accessories. Because the cheaper phone coolers often cut costs on the cable and mounting parts. Here, the accessories feel more premium than expected for the price.

On top, you get two red control buttons and an LED display. Along the side, there is a USB-C power input. The body feels solid overall, and the fit and finish are good for the Magnetic Phone Cooler category.

Key design details include:

• A wind-blocking structure that directs airflow up and down rather than out to the sides
• Two red front buttons
• A built-in display
• A top section that appears removable
• A metal mesh top area
• USB-C power input
• A metal rear contact surface

Large, flat contact plate

One of the first things you notice is the metal contact plate. It is big, flat, and clearly designed to cover a meaningful area on the back of the phone.

That helps in two ways:

• It improves contact with the device
• It supports faster heat transfer across a larger area

The plate itself is very flat, which is what you want from a mobile gaming cooler. There are no obvious issues with flatness or machining. And it used a metal contact plate rather than a silicone-covered contact surface. That has clear benefits:

• faster heat transfer
• less thermal loss through an added top layer
• more direct cooling response

Airflow Design: Heat Goes Up and Down, Not Into Your Hands

The TH28 uses a wind-blocking structure that channels airflow vertically — upward and downward — rather than pushing hot exhaust out to the sides. That design choice is more practical than it might sound, especially during extended gaming sessions.

When a cooler vents heat sideways, that warm air often blows directly onto your fingers. It is not dangerous, but the users will feel uncomfortable. But the TH28 avoids this by directing exhaust away from the grip zone entirely. Hot air exits at the top and bottom. That is a small detail, but it is the kind of detail that separates a well-thought-out phone cooler from one that simply moves a lot of air.

Removable Fan Cover Makes Cleaning Easy

One of the most practical features on the TH28 Magnetic Phone Cooler is the removable fan cover.

You can twist the top section off by turning it counterclockwise, clean the inside, and then lock it back into place. That makes dust cleanup much easier than on many sealed phone coolers. For long-term use, this is a real advantage. Dust buildup reduces cooling performance over time, so easy maintenance is important.

This feature also makes the TH28 Phone Cooler more approachable for regular users. You do not need to fully disassemble the unit or know anything technical to clean it properly.

Premium clamp and braided cable

The included clamp feels far better than you might expect in this class. It looks and feels like a serious accessory rather than a cheap add-on. There is also a 1/4-inch screw mount on one of the clamps. This adds flexibility for users who mount phones in more specialized setups.

In daily use, this is the kind of clamp that feels like a real asset rather than just a backup attachment method on the TH28 Magnetic Phone Cooler.

The braided C-to-C cable is another real plus. Cheap cables are often the weak point with a high-power phone cooler, but that is not the case here. The included cable feels robust and is good enough for proper power testing and daily use.

Weight and Portability

Weight matters on a phone cooler, especially if you plan to use it for handheld gaming.

The TH28 Magnetic Phone Cooler weighs about:

• 106.50 g for the cooler alone
• about 121.80 g with 2 clamps
• about 147.5 g with 2 clamps and a braided cable

That is not ultra-light, but a cooler with this size, contact area, and power target, the weight feels reasonable.

How To USE TH28 Magnetic Phone Cooler?

The TH28 Magnetic Phone Cooler includes two red physical buttons and a front display. This is one of the best parts of the user experience. The red buttons are funtional and the display is useful because it gives you quick feedback without needing separate tools. It can show power-related information and temperature readouts, and it makes mode switching more straightforward on the TH28 Magnetic Phone Cooler.

When you connect the USB-C power input, the device will start to work, and the LED display will show you the output wattage.

The left red control button controls the output wattage. You can short-press to change L1, L2, L3, and Ai mode. If you want to use the larger output watt, you can long-press it to adjust to up to 100% mode.

And the right red button is used to change what the display shows. It can switch to a temperature readout, a wattage readout, and a long press lets you turn the LED lighting on or off.

If you long-press the 2 buttons together, you can turn off the phone cooler. But you just need to press any button to turn it on. Of course, the cooler doesn't have a built-in battery; you can stop the power source to turn it off.

Power Requirements: This Phone Cooler Likes Real Power

This is an up to 40W phone cooler, and your charger, cable, or power bank choice can change how well it performs. With weaker power sources, the cooler may still run, but it may not hit its true maximum.

But if you only plan to use L1, L2, L3, or Ai mode, actually, most of the power sources may still be acceptable. These modes can all cool your smartphone well.

If it works best with higher-powered sources, especially if you want to take full advantage of 100% power mode.

CB3-type chargers can still run the TH28 Magnetic Phone Cooler in normal modes, but they start to fall behind once max power is enabled.

A 65W source handles the TH28 Magnetic Phone Cooler better than CB3-class chargers when pushed to full power. With a stronger 65W charger, the TH28 can reach the higher real-world draw needed for max mode. That makes a real difference.

Power Bank Compatibility

The good news is that the TH28 Magnetic Phone Cooler is not limited to wall chargers. Some 55W power banks can run the TH28 properly, even at higher modes. This makes it practical for mobile use, provided you bring the right battery pack.

Even some lower-cost power banks appear able to keep up in L3 and even 100% mode, provided they can actually sustain the required output for the TH28 Phone Cooler.

That is a strong result. It means the TH28 Cooler is demanding, but not impossible to use on the go.

Cooling Performance

Cooling performance is where the TH28 Magnetic Phone Cooler stands out.

This cooler is aggressive even before you activate the highest setting. L3 already offers serious cooling, and 100% mode pushes things into clearly enthusiast territory for the TH28 Magnetic Phone Cooler.

To make this easier to compare, it helps to look at each mode separately.

L3 Mode Performance

L3 is already strong enough for most users.

When you start the power source, it will work in L3 mode by default. It run stable and quietly to cool down your device. After a short run, the TH28 Magnetic Phone Cooler was able to pull the measured temperature down to around -9°C in room conditions. That is a very aggressive result for a phone cooler operating below max mode.

The bigger point is not the exact number. The bigger point is how quickly the cooler drops temperature in L3.

If your goal is to reduce heat during gaming, charging, or heavy app use, L3 is already more than enough to show what this unit can do.

L3 summary

• aggressive cooling without needing max boost
• suitable for demanding gaming sessions
• easier to live with than the full 100% mode
• still requires a decent power source

L1 Mode Performance

L1 is usable, but it is not especially efficient on the TH28 Magnetic Phone Cooler.

In testing, L1 brought the plate down to around -1°C. That is acceptable, but the issue is power draw. For a lower mode, it still uses more power than some buyers may expect. But it is really stable and quiet. The noise is nearly ignorable.

L1 summary

• acceptable entry-level cooling
• fine for lighter heat control
• still a bit power-hungry for the result

AI Mode Performance

AI mode is one of the more finely tuned features of the TH28 Cooler. This mode is improved and behaves more intelligently than a simple fixed low mode. At the low end, it can drop power draw to around 8W, which is a meaningful improvement for real-world use.

That matters because it reduces one of the usual problems with powerful thermoelectric coolers: condensation, especially on the TH28 Phone Cooler.

With AI mode, condensation is significantly reduced, making the TH28 Phone Cooler feel more practical for extended sessions where you need thermal assistance without overdoing it. What's more, it will auto-stop if it is cooling down for a while to adjust the temperature. It is especially for users who do not want to manually monitor temperatures.

AI mode summary

• less condensation
• better balance between cooling and efficiency
• one of the most practical everyday modes

100% Power Mode Performance

This is the TH28 Magnetic Phone Cooler at full power.

Once switched to 100% power mode, the TH28 Magnetic Phone Cooler becomes extremely powerful. It can form a thin ice layer under the right room conditions, and its cooling performance clearly steps above what L3 already delivers.

Measured results in this mode reached around -13°C, which is a serious number for a mobile gaming cooler.

More importantly, under a heavy heat simulation load, the TH28 Magnetic Phone Cooler showed that it could keep dropping temperatures aggressively instead of leveling off too soon. In a tougher test, the center area was pulled down below

10°C, while the surrounding load area was brought down to roughly the mid-30s Celsius and still trending lower.

That tells you exactly what the TH28 Magnetic Phone Cooler is about: raw, uncompromising thermal power.

100% mode summary

• extremely strong cooling
• can form frost or a thin ice layer
• ideal for worst-case gaming heat
• demands a stronger charger
• very loud

Noise Levels

Noise depends heavily on the mode used with the TH28 Magnetic Phone Cooler.

In L1, L2, and L3, the fan noise is present but not a major issue. It is noticeable, but still manageable for normal use with the TH28 Phone Cooler.

At 100% power mode, that changes. The fan becomes very loud. If you run the TH28 Magnetic Phone Cooler at full speed, you will hear it clearly—there's no getting around that.

This is one of the main tradeoffs of the TH28 Magnetic Phone Cooler's design. The cooler can deliver seriously strong performance, but at max mode, it sounds like a high-output cooling device, not a quiet accessory.

For some buyers, that is fine. For others, it will matter a lot.

Pros and Cons

Pros

• very strong cooling performance
• L3 mode is already great
• 100% mode is extremely powerful
• AI mode is improved and more practical
• premium accessories for the class
• The included braided USB-C to USB-C cable is a real plus
• large, flat contact plate
• The removable fan cover makes cleaning easy
• The clamp is much sturdier than before
• The display is genuinely useful
• Some 55W power banks can run it properly
• The full setup weight is still reasonable for the category

Cons

• The included metal plate is not a perfect fit
• A bare metal contact plate will not suit everyone
• A clamp may wear over time if used heavily
• The display is helpful but not fully accurate
• Power draw is high
• 65W-class sources are better if you want full performance
• 100% mode is very loud

Final Verdict: Is the TH28 Worth Buying?

Yes, if you understand what the TH28 Magnetic Phone Cooler offers.

The TH28 Magnetic Phone Cooler is a performance-focused smartphone cooler with real strengths. Cooling is strong in L3, extreme in 100% mode, and more flexible in AI mode than expected. The accessory bundle is better than average, the included braided cable adds real value, and the removable fan cover is one of the most useful maintenance features in this category.

The tradeoffs are also clear. Its bare metal contact plate will not be everyone's favorite design choice. And if you want max performance, you need a charger or power bank that can actually keep up. On top of that, full power mode is loud.

Still, for a specialist device built around raw thermal output, the TH28 Magnetic Phone Cooler gets a lot right. Even at the L1 mode, it is still totally great to cool your device quickly.

Bottom Line

The TH28 stands out for powerful thermal performance, useful real-time monitoring, and an above-average accessory kit. It is a practical choice for power users who prioritize cooling over total efficiency or silence. And it can work with most of the power sources, but if you want to make good use of it, you are better to pair with quality power sources.