K31 Magnetic Phone Cooling Fan

A phone that is gaming or navigating gets warm, and a warm phone slows. This K31 cooler attaches magnetically to a compatible phone and uses a semiconductor element, powered separately so it does not draw from the phone.

✅ Cool the back of the phone - The cooler is held against the phone's back and draws heat away from the surface.

✅ Attach it without a case change - The magnetic mount fixes to a compatible phone rather than needing a specific case.

✅ Keep the load off the phone battery - External power means the cooler does not discharge the phone.

Heat pulled off the phone

Fit it so the contact surface sits flat against the phone's back, and remove a thick case for better contact. Semiconductor coolers work best with airflow over their heatsink, so do not cover the fins.

Condensation can form on the cold plate in humid rooms; let the cooler reach room temperature before storing it against the phone. It cools the surface, not the battery chemistry.

Technical details

• K31 magnetic phone cooling fan
• 15 W semiconductor cooling
• Magnetic attachment
• External power

Clip it on before the phone gets hot, not after.