After the May Day holiday, the weather gradually starts to heat up, and it's easy to experience overheating and game lag when playing games on your phone, even with air conditioning and fans. The best way is to add active cooling equipment to your phone. We previously recommended the RedMagic Magnetic Cooler 4 Pro, which was loved by everyone. The RedMagic Magnetic Cooler 4 Pro comes with a magnetic sheet, making it versatile. However, some friends may not like to attach a magnetic sheet to their phone. It doesn't matter; today we will introduce the Original RedMagic Back Clip Cooler 4 Pro. The back clip version is the original form of a cooler and is suitable for all phones (except foldable screen phones). Next, we will test the actual cooling effect of this back clip cooler in detail.

RedMagic's products are of high quality, from packaging to the product itself. The accessories for the Original RedMagic Back Clip Cooler 4 Pro include a dual-C power cable and instruction manual. The power cable is approximately one meter long, which can meet the demand when in use. In addition to providing power to the cooler, it can also be used to charge your phone. The Original RedMagic Back Clip Cooler 4 Pro has a sharp and angular hardcore mech style design, which is fashionable. The shell is made of PC plastic material, which can ensure a certain structural strength while reducing weight. The surface is painted in silver, giving the plastic a metallic texture. The middle part is designed with a hollow air intake, and there is also the RedMagic logo above.

The control button for the running mode is located at the lower left corner of the body's front. The Original RedMagic Back Clip Cooler 4 Pro has four different running modes. It will run at the highest mode when connected to the power supply. We can switch to different modes according to different needs. If you have a requirement for silence, you can adjust the running mode appropriately. If you play games for a long time, it is recommended to switch to the high mode. The body size of the Original RedMagic Back Clip Cooler 4 Pro is 86 × 60 × 41mm, and it only weighs 105g.

The inside of the radiator is lined with a thermally conductive silicone pad that feels soft and has a relatively large area. The RedMagic Back Clip Cooler 4 Pro of the radiator uses RedMagic's fourth-generation semiconductor refrigeration technology and is equipped with a custom TEC semiconductor refrigeration chip, paired with an aluminum alloy heat sink, providing a very effective cooling effect. The RedMagic Back Clip Cooler 4 Pro supports phones with a width of 68-90mm, which can be installed on most phones on the market. If you want to install a mobile device with a wider body size, such as a tablet, you can choose the RedMagic Magnetic Cooler 4 Pro, which can be used with a magnetic suction accessory without width restrictions. Both the upper and lower components of the clip can be moved, making it easy to install and remove the phone. The inside of the clip is designed with non-slip silicone, which not only prevents slipping but also protects the phone.

The RedMagic Back Clip Cooler 4 Pro is equipped with a seven-blade high-speed cooling fan, with a fan speed of up to 4500RPM, which can quickly remove internal heat. For gaming mobile phones, cool lighting effects are a must-have, and the radiator body has a cool RGB dynamic lighting effect. Both the RedMagic Magnetic Cooler 4 Pro and the back clip version have RGB lighting effects, but the RedMagic Magnetic Cooler 4 Pro supports changing the lighting mode in the app, while the back clip version's lighting mode and brightness cannot be adjusted.

The peak operating power of this RedMagic Back Clip Cooler 4 Pro can reach 27W. After actual testing, when running in the highest gear mode, the operating power reached 28W within a very short time after starting, and the later running power is also very stable. When switched to the lowest operating gear, the operating power is close to 9W. If used in outdoor scenes, it can be paired with a compatible PD or QC fast charging protocol power bank.

Next, we will test the cooling performance of the RedMagic Back Clip Cooler 4 Pro under idle conditions. The test was conducted at an ambient temperature of around 20℃, and the device was operated continuously under the highest operating mode for five minutes while idle. The surface temperature of the thermal conductive silicone was measured using an infrared thermometer. The temperature change has two characteristics: fast cooling and low temperature. Additionally, under high air humidity conditions, frost can also form on the surface of the silicone.

Furthermore, some mobile phones have buttons that are located lower on the device, and in order to balance the device, we tend to place the cooler in the middle of the phone. Some people may be concerned that the back clip will affect the buttons, but we tested this and found that there were no problems with the Xiaomi 12SU. As a matter of fact, there is still a certain gap between the buttons and the back clip.

During actual testing, it can be seen that the size of this cooler is moderate and does not affect hand operation. The air outlet is designed on both sides of the device, which prevents hot air from blowing directly onto the fingers. With the addition of the cooler, the phone can run "Peace Elite" at full frame rate and with high-quality graphics for an extended period of time while keeping the temperature well-controlled. In simpler terms, the cooling effect of the cooler can exceed the heat generated by the phone itself.

In summary, the RedMagic Back Clip Cooler 4 Pro has a stylish, hardcore, and mech-inspired appearance with dynamic RGB lighting effects. The size, weight, and dimensions of the device are well-controlled and do not add much burden to the phone. The air duct design uses an inlet in the middle and outlets on both sides to avoid blowing hot air onto the fingers and improve comfort. The cooling back clip is equipped with RedMagic's fourth-generation semiconductor refrigeration technology, custom TEC semiconductor refrigeration chips, aluminum alloy heat sinks, and high-speed cooling fans, which give it outstanding cooling performance. It is an essential accessory for playing mobile games in the summer.