K3 magnetic phone cooler with semiconductor cooling plate attached to an iPhone via MagSafe mount

K3 Magnetic Phone Cooler — Semiconductor Cooling, Wholesale from the Factory

MagSafe-compatible magnetic mount + detachable back clip in one unit. In stock in Shenzhen, MOQ from 50 pcs, OEM logo from 100 pcs, ODM available.

  • Semiconductor (TEC) active cooling — plate reaches about −6 °C, visible frost in humid air
  • AI temperature control with real-time display and 4 cooling modes
  • RGB lighting ring for gaming-streamer appeal
  • 2-in-1 mount: snaps onto MagSafe iPhones, clips onto any 4.7″–7″ phone
  • Only 70 g — comfortable for handheld gaming and vlogging
  • USB Type-C 5V/3A — works with any phone charger or power bank
Wholesale tiers: 50–499 pcs · 500–2,999 pcs · 3,000+ pcs  |  MOQ: 50 pcs  |  OEM logo: from 100 pcs  |  Stock: ships in 48 hours
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Why the K3 Sells

The K3 is our best-positioned magnetic phone cooler for 2026 retail and wholesale: it combines semiconductor active cooling — the feature buyers search for when their phone overheats in games — with the two mounts a mixed customer base needs. Magnetic users snap it on; everyone else uses the clip. One SKU covers both, which keeps your inventory simple and your return rate low.

For wholesale buyers it ships from ready stock in Shenzhen in 48 hours, with tiered pricing from 50 pcs and OEM branding from 100 pcs. If you need a custom variant — different LED behavior, housing color, packaging or power spec — our R&D team develops ODM versions on the same platform. See how we produce and test every batch before it ships.

K3 Feature Tour

Every claim below is visible in our own product photos — no stock-image promises.

Exploded view of K3 semiconductor phone cooler showing TEC plate, aluminum heat sink and centrifugal fan

Real Semiconductor Cooling — Not Just a Fan

Inside the K3 is a Peltier TEC plate bonded to an aluminum heat sink with a dedicated cooling fan. The plate actively pumps heat out of the phone, reaching about −6 °C on its surface — in humid weather frost forms on the plate, which your customers can see and film. Fan-only coolers cannot do this, and it is the single biggest selling point at the counter and in listings.

K3 AI temperature control display showing live temperature readout

AI Temperature Control with Live Display

A built-in sensor reads the plate temperature and the smart mode adjusts cooling power automatically, while the display shows the live number. Buyers love a cooler they can see working — and the readout doubles as proof in unboxing and review videos. Manual mode offers 4 cooling levels for users who want full control.

K3 phone cooler with RGB lighting ring glowing during gaming

RGB Lighting for the Gaming Crowd

An RGB light ring runs around the cooling head, giving the K3 the look gaming buyers expect from their setup. It photographs and videos extremely well — a practical advantage for listings, livestreams and short-video marketing in every market.

K3 2-in-1 mounting: magnetic mount and spring back clip

2-in-1 Magnetic + Back-Clip Mount

The K3 ships with a MagSafe-compatible magnetic mount and a detachable spring back clip. iPhone 12 and newer users snap it straight on; Samsung, Xiaomi and other Android users clip it on or fit a magnetic ring. One SKU, every phone from 4.7″ to 7″ — no need to stock separate magnetic and clip versions.

Infrared thermal gun measuring the cooled phone back at low temperature K3 cooler attached to a gaming phone during a frost test

Measured, Not Claimed

We test every production batch with an infrared thermometer and a 30-minute full-load gaming run. The result is the 10–20 °C back-cover temperature drop shown in our photos — the same test our supplier verification guide teaches buyers to demand from any factory.

K3 lightweight 70 gram phone cooler held comfortably in one hand

Only 70 g — Comfortable to Actually Use

Many semiconductor coolers are bulky bricks. The K3 weighs 70 g and stays balanced in one-handed play, handheld vlogging and navigation use. At 62 × 62 × 28 mm it also packs small — a lower shipping cost per unit for your logistics bill.

K3 Technical Specifications

ModelK3 magnetic phone cooler
Cooling technologySemiconductor (Peltier TEC) plate + aluminum heat sink + dedicated fan
Plate temperatureApprox. −6 °C at room temperature (frost visible in humid conditions)
Temperature controlAI smart mode with live temperature display, 4 manual cooling modes
LightingRGB light ring
MountingMagSafe-compatible magnetic mount + detachable back clip (2-in-1)
CompatibilityiPhone 12 and newer (direct magnetic), Android 4.7″–7″ via clip or magnetic ring
Dimensions62 × 62 × 28 mm
Weight70 g
Power inputUSB Type-C, 5V/3A
Colors2 colors available
MOQ50 pcs (in stock) · OEM logo from 100 pcs · ODM available
Lead timeIn stock — dispatch within 48 hours; bulk 7–25 days, FOB Shenzhen

What Wholesale Buyers Ask About the K3

What is a magnetic phone cooler?

A cooler that attaches with magnets instead of a spring clip. It snaps directly onto MagSafe-compatible iPhones; Android phones use a slim magnetic ring or magnetic case. The K3 is 2-in-1: magnetic mount and back clip are both in the box.

Does a magnetic phone cooler work through a phone case?

Yes, with limits — the magnet holds through slim cases, but thick cases insulate and cut the cooling effect. We recommend including magnetic rings so the cooler can sit directly on the case surface.

How cold does the K3 get?

The TEC plate reaches about −6 °C within a minute, with visible frost in humid air, and typically pulls the phone's back-cover temperature down 10–20 °C in gaming. Results depend on ambient temperature, phone model and power source.

What is the MOQ and can we mix colors?

MOQ is 50 pcs, and mixed colors count toward the same MOQ. Tiers run 50–499 / 500–2,999 / 3,000+ pcs; OEM logo and packaging start from 100 pcs.

Which phones does it fit?

MagSafe iPhones 12+ snap on directly; any 4.7″–7″ phone — iPhone, Samsung, Xiaomi and more — works via the included back clip. Power is USB Type-C 5V/3A.

Related reading

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The 7 checks before you wire a deposit

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