ESR HaloLock CryoBoost Wireless Charger Review (2026): The

Why you should trust this review

I bought this charger at retail and it has lived on my home office desk for four months. ESR did not send it to me and had no input into anything written here. I cover phone and desk accessories, and I have put a long line of wireless chargers through their paces across the older Qi standard, MagSafe, and now Qi2, so I have a clear baseline for what good and mediocre look like at this size.

For this review I ran the CryoBoost on my own iPhone every day and compared it directly against a passive MagSafe puck and a passive premium stand on the same phone, focusing on three things that actually matter on a charger like this: how fast it charges, how hot the phone gets, and how loud the fan is.

How we evaluated

I measured the wattage drawn at the wall with an inline USB-C power meter during peak charging, then accounted for the standard wireless conversion loss to estimate what was actually reaching the phone. For cooling, I measured the temperature at the center of the phone’s back glass after thirty and sixty minutes of charging and compared it against the passive chargers under the same conditions.

For noise, I measured the fan with a sound meter at a set distance in a quiet room, and I also just listened to it late at night to judge whether it was distracting in practice. Over the four months I tracked cumulative charge cycles and checked the fan for any wobble or bearing noise at regular intervals to see whether the moving part was holding up.

Real 15 watt charging, which is rare here

The headline is that this charger delivers genuine full speed charging to a Qi2 certified iPhone, and that is unusual for anything not made by Apple. My inline meter read a wall draw during peak charging that, after the expected wireless conversion loss, lands right in the band the Qi2 magnetic profile is supposed to hit. In practice the phone charged at the speed I would expect from an official charger, not the half-speed crawl most third party pads deliver.

That half-speed crawl is the whole reason this matters. Most third party chargers cap out at the lower wattage because they use the older standard, where the top speed was effectively reserved for Apple’s own certified hardware. Qi2 opened that door. Because this unit is Qi2 certified, it meets the open standard and can deliver the full rate to any compliant phone, which is exactly what I saw in testing.

Cooling: where the fan earns its slot

The active fan is the whole reason to pick this charger over a flat pad, and it works. Under sustained full speed charging, my phone’s back glass settled several degrees cooler on the CryoBoost than it did on either passive charger doing the same job. That gap is not cosmetic. iOS deliberately throttles charging speed when the phone gets too warm, so a cooler charger means the phone can hold its top speed longer instead of being dialed back.

That is exactly what played out in my testing. The CryoBoost held full speed through a long charging session without the phone heating up enough to trigger throttling, while a passive puck warmed up and got throttled partway through, dropping to a slower rate. For anyone who charges in long stretches during the day rather than just overnight, and who cares about keeping the battery cool for long term health, that sustained cool charging is a tangible benefit and not just a spec.

Fan noise and long term reliability

A fan is only worth it if you cannot hear it, and for the most part you cannot. My meter put it below typical office ambient, and in normal daytime use it simply disappears into the room. In a dead silent bedroom in the middle of the night it is faintly audible if you listen for it, but it never crossed into distracting. It also only spins when the phone is actively pulling high wattage, so once the phone tops up and drops to a trickle, the fan stops entirely.

The honest concern with any fan is that it is a moving part that could eventually fail in a way a passive pad never will. After four months of daily use I have no complaints, the fan still spins smoothly, the bearing has not loosened, and the noise level is unchanged from day one. That is reassuring, but four months is not four years, and a fan is inherently one more thing that can wear out down the line. The warranty here is on the shorter side compared to some passive competitors, which is worth weighing.

Stand stability and the captive cable

The kickstand holds the phone at a fixed angle in either portrait or landscape, and landscape is what enables the always-on standby view that is one of the nicer reasons to use a stand at all. The stand is stable enough that tapping the screen does not knock the phone loose, which is not something every magnetic stand gets right. The magnetic alignment snaps the phone into place cleanly every time.

One design note worth flagging: the included power brick is bundled in, which is welcome, but the cable is captive, meaning it is fixed to the unit rather than removable. That keeps the package tidy but means a damaged cable is a bigger problem than swapping a detachable one. It also needs a reasonably capable USB-C power source to spin the fan and hit full speed, so feeding it from a weak old phone charger will leave it underpowered.

Who should buy the ESR HaloLock CryoBoost?

Buy it if you charge your iPhone in long sessions during the day rather than just overnight, if you want the battery to stay cool for long term health, and if you like the open Qi2 direction and want a stand that supports the standby landscape view.

Skip it if you only ever charge overnight, where a simple passive puck does the job without a fan. Skip it too if you need to charge an Apple Watch on the same unit, since this is a single device charger, or if you simply do not want any moving parts in your charger.

The verdict

The ESR HaloLock CryoBoost does the two things that actually matter on a charger like this. It delivers genuine full speed Qi2 charging, which is rare outside Apple’s own hardware, and its fan keeps the phone meaningfully cooler under sustained load, which translates into faster charging that does not get throttled and a battery that runs cooler over its life. The captive cable and the long term question mark over any fan are the real caveats, and it costs more than a plain pad. But for someone who charges in long stretches and cares about heat, the cooling is worth it, and after four months it has held up cleanly.