ESR 3-IN-1 WIRELESS CHARGING SET WITH CRYOBOOST: FASTEST 15W WIRELESS MULTI CHARGER WE'VE TESTED

ESR is among the first batch of forward-thinking companies to update all its charging solutions to the 15W Qi2 standard.

- BY SIMON JARY

Its first update was to the popular 3-in-1 Wireless Charging Set, which was first available as a 7.5W MagSafe-compatible charger and then as a 15W Qi2 version. It works with all iPhones since the iPhone 12 except the iPhone SE and iPhone 16e.

The company has now refined its Qi2 3-in-1 charger with a cooling technology it calls CryoBoost. In fact, this is the second generation of CryoBoost, which seeks to solve the biggest efficiency blocker in wireless charging: heat. If a device is too hot or too cold, wireless charging and indeed general battery performance is negatively affected.

CryoBoost’s open duct system improves airflow and therefore cooling efficiency. ESR claims this can reduce connected device temperatures by 42°F (5.5°C), ensuring safer and more stable charging. It is meant to keep your phone below 100.8° F (38.2°C) during charging.

The charging pad is cooled by a fan, and ESR has reduced fan noise from 30dB to 25dB—don't worry, you'll barely hear it even if you put your ear right next to it.

DESIGN

This latest version retains the same classic slim 3-in-1 charging stand design as the noncooled ESR 3-in-1 Qi2 Charger (fave.co/42IdHZJ), with the magnetic charging pad for iPhone raised 4 inches from the desk. At its base is a 5W Qi charging pad for your AirPods case.

The charger’s overall footprint is small. It measures 3.7×3.7×7 inches (9.5×9.5×18cm) and weighs 12.3oz (350g).

At the back of the iPhone charging pad is the charging module for Apple Watch, which is Apple certified for Watch fast charging.