shijianwy K18 Magnetic Phone Cooler 2500mAh Battery 9000 RPM
Magnetic phone cooler with 2500mAh battery and 9000 RPM fan runs two hours cord-free
- Accessory TypeRechargeable Battery Version
- Dimension4 L x 2.5 W x 3.5 H inches
- Package Contentsphone cooler*1N
- 2500 mAh battery gives up to 2 hours cordless cooling
- 9000 RPM fan with AI temperature control prevents overheating
- Quiet 25 dB operation suits streaming and video calls
- Digital display shows mode battery level and real-time temperature
- Compact 4 x 2.5 x 3.5 inch alloy and carbon-fibre design
shijianwy K18 Magnetic Phone Cooler
The shijianwy K18 is a magnetic phone cooler with a detachable 2500mAh battery that provides up to 2 hours of cordless operation. A 9000 RPM fan and AI temperature control lower device heat in minutes while noise stays at 25 decibels. The unit measures 4 x 2.5 x 3.5 inches and weighs 4.16 ounces.
Compatibility check before ordering
The cooler attaches magnetically, so the phone must support MagSafe or a compatible magnetic ring for secure mounting. A USB power source is required to recharge the external battery between sessions. The package contains only the cooler itself; no cables or adapters are included.
Upgrade from basic clip-on fans
This model replaces simple clip-on coolers that lack a battery, digital display, or smart temperature modes. The jump is worthwhile for users who need cordless freedom during long gaming, streaming, or video-call sessions and want real-time temperature feedback on the built-in display.
Highlights
- 2500 mAh battery gives up to 2 hours cordless cooling
- 9000 RPM fan with AI temperature control prevents overheating
- Quiet 25 dB operation suits streaming and video calls
- Digital display shows mode battery level and real-time temperature
- Compact 4 x 2.5 x 3.5 inch alloy and carbon-fibre design
Specifications
| Brand | shijianwy |
|---|---|
| Model | K18 |
| Part Number | K21 |
| Accessory Type | Rechargeable Battery Version |
| Dimension | 4 L x 2.5 W x 3.5 H inches |
| Package Contents | phone cooler*1N |
Questions about this item
Does the package include anything besides the cooler itself?
The box contains the phone cooler only; no cable, charger, or mounting hardware is listed.
Which mode should I select for automatic temperature control?
Choose AI mode — the built-in chip reads the contact surface temperature in real time and adjusts the fan speed to match.
What does the 9000 RPM rating mean in everyday use?
The fan can spin up to 9000 revolutions per minute, delivering strong airflow while the noise level stays around 25 decibels.
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