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Rectangular magnetic phone cooler with detachable battery, carbon-fibre texture and RGB LEDs

shijianwy K18 Magnetic Phone Cooler 2500mAh Battery 9000 RPM

SKU CH-43AY-EVMGM

Magnetic phone cooler with 2500mAh battery and 9000 RPM fan runs two hours cord-free

  • Accessory categoryRechargeable Battery Version
  • Measurements4 L × 2.5 W × 3.5 H inches
  • In the boxPhone 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.

How it compares

Measured against everything we stock in Laptop Cooling Stands & Fans, at today’s prices. Recalculated every night.

Price $19.99
Typical for this category: the median of 6,190 items is $20.99.

Specifications

Product
Brand nameShijianwy
Model nameK18
Part numberK21
Accessory categoryRechargeable Battery Version
Size & build
Measurements4 L × 2.5 W × 3.5 H inches
In the box
In the boxPhone 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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