ESR HaloLock vs CryoBoost: what the names mean
This is not a comparison between two products, because they are not two products. HaloLock is the magnet system; CryoBoost is a cooling feature that some HaloLock chargers have. Here is the version that matters.
By Sawyer V. · Published · How we research
We have not tested any of this. Everything below is compiled from published manufacturer specifications, and the arithmetic is printed so you can check it. This page carries affiliate links: if you buy through one we earn a commission at no extra cost to you, and it does not change the order of the picks. Full disclosure.
The short answer
They are not competing products. HaloLock is ESR's brand for its magnetic attachment system, used across dozens of products. CryoBoost is a cooling feature — a fan plus heat-dissipating components — fitted to some HaloLock chargers and not others. So the real question is not “HaloLock or CryoBoost”, it is “which HaloLock charger, with or without CryoBoost?” For a car, get the one with CryoBoost: heat is what limits wireless charging in a car, and cooling is the only feature that addresses it.
| # | Pick | Install | Score | Price |
|---|---|---|---|---|
| 1 | ESR HaloLock Qi2 with CryoBoost The heat problem, solved at the mount | Clips on | 8.8/10 | Check price on Amazon |
| 2 | Belkin BoostCharge Pro Qi2 Car Charger The one that comes with everything it needs | Clips on | 8.2/10 | Check price on Amazon |
No live price is currently verified, so every button here reads Check price rather than a number we cannot stand behind. Why we do it that way.
Why this comparison keeps getting searched
Because ESR's naming makes both words look like product names when only one of them is. A listing reads “HaloLock Qi2 Wireless Car Charger with CryoBoost”, which parses naturally as two things joined by “with”, and the obvious next question is which one you need.
You need both, because they are not alternatives. Here is the actual hierarchy.
HaloLock: the magnet system
ESR's brand name for its magnetic attachment. It appears on car mounts, desk stands, power banks, wallets, tripods and charging stations. If a product says HaloLock, it means magnets that align with an iPhone's MagSafe ring or a Qi2 magnet array.
Every ESR magnetic product is a HaloLock product. It tells you the phone will snap on aligned. It tells you nothing about charging speed, cooling, or whether the thing charges at all — plenty of HaloLock products are holders with no electronics in them.
CryoBoost: the cooling feature
A fan plus heat-dissipating components built into some HaloLock chargers. It is an option on a subset of the line, not a separate product family and not an alternative to HaloLock.
Its job is narrow and genuinely useful: keep the phone cool enough that it does not throttle its own charging. That is the actual limiting factor for wireless charging in a car, and it is the one nobody addresses.
Why cooling matters more than the wattage number
Wireless charging is inefficient, and the inefficiency becomes heat in both the coil and the phone. Put that phone on a dashboard in summer, running navigation with the screen at full brightness, and it is already warm before charging begins.
Phones defend themselves by throttling charge rate as internal temperature rises. So the practical sequence on a hot day is: full rated speed for a few minutes, then progressively less, then very little. The mount is doing its job the whole time; the phone is refusing the power.
Active cooling attacks that directly. It does not make the charger more powerful — the ceiling is still 15 W — it makes the phone willing to accept the power for longer. In a car that is the difference that shows up on the battery percentage.
The requirement both versions share
ESR publishes it plainly: a USB-C source of 20 W or more is needed for the mount to deliver its rated output. That is more than most factory USB ports supply and more than a bare 12V socket supplies, which is nothing.
So a HaloLock car charger of any description is a two-part purchase unless you already have a capable car charger. Add one from the charger page, or buy a mount that includes a supply — Belkin's does, which is on this page for exactly that contrast.
The version of this decision worth considering
Belkin's BoostCharge Pro takes the opposite approach: same Qi2 15 W, no active cooling, and everything you need in one box including a 20 W USB-C car supply, a five-foot tethered cable and a two-year warranty.
The trade is clean. ESR sells you the feature that addresses the physics and expects you to solve the power supply. Belkin sells you a complete system and does not address the heat. At $39.99 against $71.99, and given that most people already own a car charger or should, the ESR is the better buy for most — but if you want to open one box and be finished, Belkin is a legitimate answer.
The summary, in one line
HaloLock is the magnet. CryoBoost is the fan. Qi2 is the speed. In a car you want all three, plus a 20W charger to feed it — and if the fan bothers you, buy a cable and a plain magnetic mount instead, which is a perfectly good outcome for a third of the money.
Every pick, with the working
Each entry lists the specifications the maker publishes, the axis scores those specifications produce, and what you give up. Rows that read “Not published” are not omissions on our side: they are things the maker will not commit to in writing, and they cost the product points on the transparency axis. Specifications compiled September 4, 2026.
Our pickThe heat problem, solved at the mount
ESR HaloLock Qi2 with CryoBoost
Qi2 certified 15W with an actual cooling fan built into the mount. That sounds like a gimmick until you have watched a phone throttle its own charging to a crawl on a summer afternoon while running navigation. Wireless charging in a hot car is a thermal problem before it is a power problem, and this is the only mount here that addresses it directly.
- Wireless standard
- Qi2 certified
- Wireless output
- 15 W
- Cooling
- CryoBoost active fan plus heat-dissipating components
- Required input
- USB-C PD source of 20 W or more
- Attachment
- Vent mount
- Magnet
- MagSafe compatible alignment
- Warranty
- Not published
- Operating range
- Not published
List price $39.99 per ESR's own store, sale price (regular $59.99), captured on the compile date below. Not a live price and not what you will pay — the button is where the real number is.
What it gets right
- Qi2 certified at the full 15W, not a 7.5W mount described as fast
- Active cooling fan, which is the difference between 15W sustained and 15W for four minutes
- Magnetic alignment does the aiming for you, one-handed, without looking
- $39.99 sale against a $59.99 list
Flaws
- Needs a USB-C source of 20W or more, which most cars do not have from the factory — budget for a car charger too
- There is a fan in your car, and you can hear it when the stereo is off
- Vent mounting means a blocked vent, on the mount whose selling point is cooling
The working behind the 8.8
- Heat headroom: not scored (weight 22%)
- The maker publishes no operating-temperature ceiling, so this axis is dropped and the other weights are re-normalized.
- Install effort: 9.0 (weight 24%)
- Clips onto a vent blade or a headrest post. Two minutes, no tools, no adhesive, no residue.
- Price against the ceiling: 9.5 (weight 24%)
- Listed at $39.99 on the compile date. This site's buyer has a practical ceiling around $150 for a single upgrade, so the scale rewards everything under $100 and falls away sharply past $150. The live price is very often different, and that is what the button is for.
- Written commitment: not scored (weight 15%)
- No warranty term published, so this axis is dropped and the other weights are re-normalized.
- Spec transparency: 7.5 (weight 15%)
- 6 of the 8 specifications we went looking for are published by the maker (75%). A blank row is never a guess here: it prints “Not published” and it costs the product points, because a figure nobody will commit to in writing is a figure you cannot check.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled September 4, 2026 from ESR's Qi2 CryoBoost car charger page.
2The one that comes with everything it needs
Belkin BoostCharge Pro Qi2 Car Charger
Qi2 at 15W with the 20W USB-C car power supply and a five-foot tethered cable in the box, plus a two-year warranty and Belkin's connected-equipment cover. Every other wireless mount here needs a car charger you buy separately; this one does not, and once you add that cost the price gap narrows considerably.
- Wireless standard
- Qi2 certified
- Wireless output
- 15 W
- In the box
- Mount, 5 ft tethered USB-C cable, 20 W USB-C PD car supply
- Warranty
- 2 years, plus connected equipment cover to $2,500
- Attachment
- Vent mount
- Orientation
- Portrait or landscape
- Cooling
- Not published
- Operating range
- Not published
List price $71.99 per Belkin's own store, captured on the compile date below. Not a live price and not what you will pay — the button is where the real number is.
What it gets right
- 20W USB-C PD car power supply included, so the box is genuinely complete
- Two-year warranty, the longest of any mount in this ledger
- Qi2 certified 15W with one-handed alignment in portrait or landscape
- Tethered 5 ft cable with a strap and rear holder, so it does not become a loose-cable problem
Flaws
- $71.99 list, comfortably the most expensive mount here
- No active cooling, so sustained 15W in a hot car is optimistic
- Vent mounting only
The working behind the 8.2
- Heat headroom: not scored (weight 22%)
- The maker publishes no operating-temperature ceiling, so this axis is dropped and the other weights are re-normalized.
- Install effort: 9.0 (weight 24%)
- Clips onto a vent blade or a headrest post. Two minutes, no tools, no adhesive, no residue.
- Price against the ceiling: 8.0 (weight 24%)
- Listed at $71.99 on the compile date. This site's buyer has a practical ceiling around $150 for a single upgrade, so the scale rewards everything under $100 and falls away sharply past $150. The live price is very often different, and that is what the button is for.
- Written commitment: 8.0 (weight 15%)
- 24-month warranty. This is the only promise in the entire listing that a court would read, which is why it is scored and the marketing copy is not.
- Spec transparency: 7.5 (weight 15%)
- 6 of the 8 specifications we went looking for are published by the maker (75%). A blank row is never a guess here: it prints “Not published” and it costs the product points, because a figure nobody will commit to in writing is a figure you cannot check.
Axes with no published input are dropped and the remaining weights re-normalized, so a product is not punished for a category where an axis does not apply. Specifications compiled September 4, 2026 from Belkin's Qi2 15W magnetic car charger page.
No live price is currently verified, so every button here reads Check price rather than a number we cannot stand behind. Why we do it that way.
Questions people actually ask
Is CryoBoost a different product from HaloLock?
No. HaloLock is ESR's magnetic attachment system and appears across its whole range. CryoBoost is a cooling feature fitted to some HaloLock chargers. A CryoBoost charger is a HaloLock charger.
Do I need CryoBoost?
In a car, yes, if you want sustained charging in warm weather. Heat is what makes a phone throttle its own charging, and cooling is the only feature that addresses it. In a cool climate or on short drives it matters much less.
Does the fan make noise?
There is a fan in your car and you can hear it when the stereo is off. That is a real trade rather than a footnote, and it is the main reason somebody might reasonably pick a mount without cooling.
What power supply does it need?
ESR publishes a requirement of a USB-C source of 20W or more. Factory USB ports are usually below that, so plan on adding a car charger unless the mount includes one.